Until then, my serious engines are sealed by this method. Also available from WPE are exhaust flanges, valley trays, and every other part youll need for installation. I dont have time to figure out why some companys product failed, especially when there is something else I can get my hands on that performs reliably. This new head features a modern 77cc combustion chamber, new larger 2.150 intake valve and updated ports for improved flow CHECK OUT THESE OUTSTANDING FEATURES: RAISED EXHAUST PORTS THAT ACCEPT STANDARD FLANGES. hump in the exhaust port, clean up of the bowl area behind the valve seat, and tear Cookie Policy. We will safeguard your e-mail and only send content you request. The Stage 1 head is fully CNC-machined and is delivered with 5/16-inch bronze valve guides and iron seats. NO WATER BY PORTS SO PORTING IS INFINITE. Oldsmobile Top End Kits; Oldsmobile Aluminum heads; Oldsmobile Intake and fuel systems; Oldsmobile rotating systems; Camshafts and lifter sets; Oldsmobile roller rockers and pushrods; Bolt on a set of fully assembled heads for instant power gains! If you want a free port job on your small-block Olds heads, put the die grinder down. Heads are available with bronze guides and iron seats, with a beryllium-copper seat available for max-effort applications. The cylinder head is machined so that the stainless .041-inch-diameter O-ring protrudes .015 inch up from the deck, and the corresponding .040- to .060-inch-wide receiver groove is machined at the same depth into the block. JavaScript is disabled. 0000001493 00000 n Hb``d``Z @KrB10Z&00040Dscc` '00 endstream endobj 35 0 obj 69 endobj 25 0 obj << /Type /Page /Parent 19 0 R /MediaBox [ 0 0 676 927 ] /Resources << /XObject << /Im0 29 0 R >> /ProcSet [ /PDF /ImageC ] >> /Contents 26 0 R /PieceInfo << /AdobePhotoshop << /LastModified (D:20120817155034-08'00')/Private << /RoundTrip 1 /ExportCrispy false /SaveTransparency false /ImageResources 30 0 R /XObject << /Im0 29 0 R >> /StandardImageFileData 31 0 R >> >> >> /LastModified (D:20120817155034-08'00') /CropBox [ 0 0 676 927 ] /Rotate 0 >> endobj 26 0 obj << /Filter /FlateDecode /Length 27 0 R >> stream Oldsmobile factory-production big-block cylinder heads are identified by a letter cast into the front lower portion of the head on the number-1 and number-8 cylinders. Speedmaster El Rayo ignition system are designed for the enthusiast that is serious about performance but needs the small cap size due to space considerations when installed. Copper head gaskets get a bad rap from people, mostly because the O-ring job was performed incorrectly, allowing coolant into the engine. 0000000833 00000 n Known for giving you the optimal airflow combination for maximum engine performance. Dont stress out over the finish; just leave no rough cuts. Seen here are two angles of the intake port. Big race port is 300cc and hits 390 cfm. Virtually every set of Procomps I sell/install get 2.125 intakes because the bowls are more conducive to that valve size. The Oldsmobile V-8 engine is not dead, says engine builder Brad Wise of Wise Performance Engineering. These Hurst Olds D heads are some of the rarest Olds heads. Giant Killer by Chris Hemer, Popular Hot Rodding Bigger isnt always better and Mondellos 307 Olds proves the point. This website uses cookies to improve your experience. Wow the before the bowl work they are far from impressive. Valve covers, fuel-injection-capable 4bbl-style intake manifolds, and other parts to install the cylinder heads are also available. Cookies are disabled. Specs . Developed by William Estler in the 1940s, this tomato is known for its large size, sweet flavor, and disease resistance. You have a direct, line of sight to the valve on both the intake and exhaust side. Notice the shape of the port under the intake seat. CUSTOM ENGINEERED GUIDEPLATES FOR THE ABSOLUTE BEST ALIGNMENT. All Steel Roller-Tip Adjustable Rocker Arm Systems, All Steel Roller-Tip Adjustable Rocker Arm Systems (Cast Iron Applications), Non-Roller Adjustable Rocker Systems (Cast Iron Applications). With 70cc chambers built into the heads from the beginning, the heads handle street performance, but Wise explains that users looking to use them in more aggressive combinations can knock down the chamber dimension by decking the cylinder head and build some compression into the engine. Edelbrock Aluminum Cylinder Heads are ready to bolt on and go right out of the box. Available with 2 different programs, stock valve or our big valve race version. A street port job will open things up nicely. Bolt on a set of Speedmaster's fully assembled cylinder heads for instant power gains. Plus, you can turn up the horsepower even more by choosing heads with CNC-ported runners and chambers, CNC-profiled chambers and other enhancements. $3795. I have reused them multiple times by carefully cleaning them and applying a very light layer of silicone over the entire gasket. The most desirable small-block Olds cylinder heads are the number-6 and number-7 castings. THIS IS JUST A SAMPLING OF THE MANY FEATURES THESE HEADS HAVE. My #6 heads probably flow close to the first numbers. I only use these on cast-iron head engines. WebSpecializing in Oldsmobile high performance 4509 Crichton Ln. Always remember, at Mondellos you get what you pay for: Horsepower, not promises. The heads are making really good power. Submit your email to receive the latest stories and expert advice This design allows you to select a wide array of thicknesses for the application. Includes full no cnc job or significant port work? Not a lot of flow yet as there's no real work in them yet They're going on a 461, cn crank, stock rods, arp head, rod, main bolts. The lowest combustion chamber volume I ever had on an Edelbrock Performer RPM head with the standard combustion chamber was on the 2009 Engine Masters Challenge engine at 46 cc. So give your heads a check with a set of vernier calipers to make sure that the deck surfaces are parallel to the valve-cover rail and the same as each other. In order to shop on this Web store, you must have JavaScript enabled. Authorized dealer for all Holley products, Comp, Erson, Lunati cams, Mahle and RaceTec pistons. If you have him do a full port job, you will not be disappointed. The famed Mondello-Matsubara Blown Fuel Altered won two National Events in the 1960s. Flow testing: $100 Flow testing of one intake and exhaust - performed on our custom built bench at 28" of depression with flow sheet provided. Wise offers his expertise in setting up the cylinder heads per customer input and through the application of his 30-plus years of experience with the Oldsmobile platform. They feature double-pinned rotors (timed and clearanced after assembly), heavy duty front and rear bearing plates, and an intake manifold. Race Recondition: $350 Complete recondition of cylinder heads with a Serdi cut valve job, surface mill, cleaning, inspection, re-assembly and new valve seals installed. To learn more, view our, For the ultimate in performance, our E-CNC cylinder heads are the answer. We then basically put those dimensions into our cylinder head, and then worked around the port and chamber dimensions to make everything fit within in Oldsmobile platform, he says. If its a 383 stroker, you can probably go with 200cc intake runners. Get big-block heads, mill the deck surface so you can get the combustion chamber volume, and presto! Yes, they have a ton of potential but need some work to get there obviously. Includes complete reshaping of the intake and exhaust ports. Much like a Pontiac engine, WPE makes use of a valley tray with their design that is installed in the lifter valley to allow for intake installation and removal without affecting the cooling system. JavaScript seems to be disabled in your browser. The same goes for the intake and exhaust ports on the muscle-car-era castings. I'm sure I'll get flamed for not using e-brocks anyways.. All of the small-block combustion chambers have roughly the same shape, but vary in volume. Edelbrocks Pro-Port Raw Cylinder Heads are purpose-engineered castings for custom racing engines. While few would ever recommend bolting small-block heads on a big-block engine, using the big-block heads atop a small-block bottom end is a cool hot rod trick. Speedmaster cylinder heads offer great performance for less than it would cost to rebuild an old set. You must choose UPS Ground to help ensure your order arrives before Christmas. This car is called the Hefty HEMI and will compete in the NMCA - Nostalgia Super Stock class! CNC combustion chambers offer superior control over flame travel and quench area. I sent the head out to them and had them build their complete shaft-style rocker system on it. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. 1101 W. Rialto Ave. Rialto, CA 92376, USA+1 (310) 361-0020, 23 Mount Erin Rd,Blair Athol NSW 2560, Australia+61 2 9607 2299. The head has 1.125-inch decks, so were able to handle 2,000 horsepower blown and turbocharged combinations without any issues of the deck moving around. Head Porting At Home by Marlan Davis, Car Craft Professionally prep your own heads with Mondellos home porting kit. The T&D shaft-rocker system was developed specifically for this cylinder head configuration. Complete w/ Brodix Severe Duty 2.375 2 Brodix Race Rite 365 -385RRX square port complete heads. It is also known as Radiator Charlies Mortgage Lifter, after Charles Byles (1890-1976), an auto mechanic, This website uses cookies for functionality, analytics and advertising purposes as described in our, http://www.xsrpms.com/dragnet/rides/napier/index.html. 7/16"CAN BE USED WITH NO ISSUES AND DRILLED FOR 3/8" PUSHRODS. 0000001469 00000 n First of all, I'm just a homegamer in the Oldsmobile cylinder head department. Very happy with the power made on the dyno with the Edelbrock Carbs. Trust me, when the job is done properly, there arent any sealing issues in the highest-horsepower applications. Luckily, I saved all of my used ones and reused them by glass-bead cleaning them and gluing a .015-inch-thick soft copper wire around the raised combustion ring. Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. Fully cnc'd. Stage I BP: $300 Our "street" port job - a minimum recommended porting stage. // Ported Item is a matched pair of 1967-68-69 OldsmobileC code cylinder heads that have been stripped and prepped for a performance rebuild. Get Heads Shop can be contacted at (201) 223-2300. The first step is to understand the causes of climate change and how we can reduce our impact on the environment. Stage III: See below for pricing Complements any head porting for maximum horsepower. The Oldsmobile factory-production small-block cylinder heads are identified by a number cast into the front lower portion of the head next to the number-1 and number-8 cylinders. In years past, I measured intake runner volume in a bunch of different-lettered iron cylinder heads, and found that the E castings were second in line to the J heads in small runner size. And a very good head porter. COMING SOON IS THE ROCKET RACING TUNNEL RAM FOR OUR RRP HEADS!!! Comes completely assembled with roller cam springs speced out When performing the O-ring and receiver-groove operation, location of the O-ring and receiver groove is absolutely important. 1 PAIR OF ROCKET RACING CYLINDER HEADS. The E castings are smaller than the others, but only by a few cubic centimeters. Includes port matching and blending of the plenum and its dividers. 0000363215 00000 n Get Heads Shop reviews, rating, hours, phone number, directions and more. I plan on finding a GT-40 upper and lower intake. Pro-Port Raw heads are semi-machined with finished accessory, intake and exhaust flange bosses. Filling the exhaust heat crossovers can never hurt. We also use third-party cookies that help us analyze and understand how you use this website. 1979 2023 Speedmaster. So remember: J is for junk. Olds Oldsmobile 1969 BareC Heads / 455 / XLNT! When they do fail in these applications, it usually ruins something like the block or the cylinder head. Jason draws on over 15 years of experience in the automotive publishing industry, and collaborates with many of the industry's movers and shakers to create compelling technical articles and high-quality race coverage. WebAt the end of the day, pocket porting may not produce the fastest-looking set of heads or the most photogenic, but the results can be very satisfying. Now, Wise Performance Engineering has developed the Oldsmobile Z cylinder head, based on hundreds of hours of research and development time. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. Mondello Performance Products, Inc. 1103 Paso Robles Street Paso Robles, California 93446, Toll Free Order Line: 877-322-4489 (Ordering with part numbers only). I dont really know, but when I have an issue with something, I dont use that product again. The combustion chamber in the WPE Z head mimics the design of the SB2, as do the exhaust ports. The 2 columns are a before and after bowl porting/blending. Competition-ready heads feature fully CNC machined combustion chambers and blended seats for increased air flow and well as revised exhaust valve angles for larger intake valves. Tests performed same day at delta P= 28" Hg Edelbrock heads ported by RR flow virtually identical to those ported by M at valve lift above 0.400", but at 0.200" lift, M porting yields 20% better flow than R porting. That gasket performed very well at 11:1 compression and I never had a gasket failure. Stage I: $300 Complements any of the above mentioned port jobs. WebCompetition Components Now offers CNC Ported Cylinder heads for Oldsmobile Engines. CNC HEADS ARE AVAILABLE FULLY CNC PORTED AT AN ADDITIONAL COST. These heads were a good bang for the buck with room to grow vs the cam that I am running. Older Post I have had various issues with them. ROLLER CAMSHAFT ..Call for pricing, SOLID ROLLER CAMSHAFT Call for pricing, CNC PORTED CYLINDER HEADSCall for pricing. WebSpeedmaster CNC ported cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and cost effectiveness. O-rings can be installed in the head or the block, but preferably in the cylinder head. Web440 Olds Stroker Small Block Photos by Chris Hemer, Popular Hot Rodding The strong arm solution for weak-kneed 350s. Extremely aggressive , suited for next level all-out competition. In those days, the shops clientele read like a Whos Who of drag racing greats. We wanted to keep the design as close to OEM specs as possible so that guys could bolt these on using existing components, but have a chamber design thats modern. This website uses cookies to improve your experience while you navigate through the website. Bernard Mondello, Joes son, grew up surrounded by the richest heritage in drag racing history. Rocker arms and other supplemental parts increase the price as well. As well as port matching. When you remove a cylinder head torqued up with a copper head gasket, you literally have to pry the gasket off the block because the soft copper embeds into the receiver grooves, which is what seals the combustion pressure. Build your own custom newsletter with the content you love from Dragzine, directly to your inbox, absolutely FREE! Peppers take longer than tomatoes to get going, so start them first. Mated with the fuel injection, it starts right up, has a nice raspy idle and great throttle response., 572 HEMI in a 64 Dodge 440 - Best Machine Racing Engines built the engine - we chose the Edelbrock heads as they were impressive castings with great finish and flow right out of the box! Churn out all the asphalt-chewing, road-grating horsepower you want with our massive selection of rotating assemblies! SpeedmasterTM kits bring together everything you need. These cylinder heads can certainly be made better with some work, but it is generally best to use the older castings. Our Cylinder Heads are built and assembled in-house at our facility in California. Operating within the idle-5500 rpm range - they fit the bill perfectly. When BTR performs this operation, the O-ring and receiver grooves are located off of the cylinder head and block dowel pins, and are machined on a Cincinnati CNC machine, which makes it easy to get perfect. Feel free to contact us for any custom quotes. Any time you force air to flow along a particular path, the total flow almost certainly drops. This method brings you pretty close. Joe Mondello and Racing are synonymous with each other. Speedmaster Cylinder Head parts have been assembled with the finest premium components to provide your engine with optimal airflow for maximum engine performance. Stage I PM: $300 Our "street" port job - a minimum recommended porting stage. Speedmaster has taken the guesswork out of top-end component selection by actually placing the top end components together in complete kits. Mike is a great guy. I had those sitting here, and took a look at the chamber design and the shape. 0000369682 00000 n As well as port matching. Traco Engineering, known at the time for extremely fast Indy cars and various sprint cars, utilized Mondello heads exclusively. This creates additional horsepower and torque. SpeedmasterTM cylinder heads offer improved power throughout the rpm range for greater throttle response and top-end horsepower. 403 Olds Engine Building by Cam Benty, Popular Hot Rodding More tips on a 403 buildup. All rights reserved. Stage II: $550 Our "street/strip" port job - for those on a budget. I wouldnt say these gaskets are the best choice for aluminum heads. Porting at Home by Michael Lufty, All Chevy Head Wizard Joe Mondello offers tricks of the trade. Includes port matching. WebEdelbrock RPM Olds 455 Head Porting HeavyOlds 268 subscribers 642K views 15 years ago The scariest thing I ever did was port a set of new Edelbrock aluminum cylinder heads. 0000369701 00000 n Once cookies are enabled please refresh the current page. 0000001449 00000 n Whether youre growing hot or sweet varieties, there are some important tips for success. Installing these larger valves should be standard procedure, even for stock rebuilds. Tomato enthusiasts have long debated the merits of determinate versus indeterminate varieties. One such individual is Brad Wise of Wise Performance Engineering. 365-385 ports. as well as profiling of the combustion chambers. Good middle of the road plug, not too expensive, high quality, regularly stocked everywhere. This, Affordable Street Performance Applications, Select Performer Heads are 50-States Legal, Next-Level Street Performance Applications, High-Performance Street & Light Race Applications, Available in CNC Ported for Maximum HP/TQ, Raised Runners, Revised Chambers and Relocated Valves, Available with original Edelbrock script or block logo design, Available with raised-roof combustion chamber design for high-lift cams, Manufactured by the company that pioneered Flathead performance, The only heads designed specifically to accommodate almost any CNC port configuration, Hot Isostatic Pressing castings available for increased strength and density, Cast in the USA at Edelbrocks state-of-the-art foundry. If you get a set of roller rockers that don't require any machine work to install, you can put them on Another method of blocking the exhaust crossover is to machine a pocket on the intake side and press fit or silicone a piece of metal in there. WebOldsmobile factory-production big-block cylinder heads are identified by a letter cast into the front lower portion of the head on the number-1 and number-8 cylinders. The perfect cylinder head, designed for entry-level that results in great driveability, power and economy. The oldest castings (used on the 1965 400 to 425-ci engines) have the letter A, and the latest big-block production castings have the letter J. The series ended there. All rights reserved. Joe Mondello designed open chamber big and small block Chevy cylinder heads and pistons long before Chevy did. Rated 5.00 out of 5 $ Add to cart $ 995.00 Add to cart; Home; Parts. It looks like you could go huge on the exhaust ports, but I know that sometimes going too big actually kills velocity. From extreme weather events such as droughts, floods, and wildfires to the melting of polar ice caps and rising sea levels, it's clear that our planet is in trouble. In the 60s & 70s, this was the fastest wedge-head Chevrolet, running a 7.24 E.T. Heads Shop is located at 4101 Bergen Turnpike in North Bergen, New Jersey 07047. These castings are undesirable for performance use. EFVU(eufv7GWgw8HXhx)9IYiy*:JZjz m !1AQa"q2#BRbr3$4CS%cs5DT Some of the key features include: Speedmaster CNC ported cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and cost effectiveness. WebThe Olds head can gain about 80% of its total potential flow by matching ports on intake and exhaust side (yes grind out those headers), removing A.I.R. WebOLDSMOBILE ALUMINUM HEADS 330,350,403,400,425,455. But I have not had a failure with these gaskets on cast-iron cylinder-head engines. Combustion Chamber, Exhaust and Intake Ports all fully CNC machined for better flow. WebPorting an Oldsmobile Small Block Head 2,618 views Sep 9, 2021 57 Dislike Share Junk Dump 352 subscribers Watch me port an Oldsmobile small block head. They did change quite a bit in the later smog engine years. H*-537S0 BK#s0k ] endstream endobj 27 0 obj 40 endobj 28 0 obj 361529 endobj 29 0 obj << /Type /XObject /Subtype /Image /Interpolate false /Filter /DCTDecode /Width 676 /Height 927 /BitsPerComponent 8 /ColorSpace /DeviceRGB /Length 28 0 R >> stream It is the same method used by 5,000+-hp NHRA Top Fuel cars. Those Shelby Ford Cobras, 1st, 2nd, 3rd & 4th places respectively. WebCompetition Components 4406 Van Atta Rd. you have a ported head. DRILLED FOR 1/2" HEAD STUDS. Burning fossil fuels for energy rel, Estlers Mortgage Lifter: An Heirloom Tomato Variety Perfect for Home Gardeners, Gardening is an enjoyable and rewarding hobby that many people enjoy. 32806 407-855-9559 rocketranch@msn.com. Joe Mondello began doing research & development work for Oldsmobile in 1968 and his ongoing commitment and dedication has merited him the name of Dr. The big-block and diesel engine blocks also used a 3.000-inch main bearing diameter over the small-blocks main bearing dimension of 2.500-inch. Research, compare, and save listings, or contact sellers directly from 160 Oldsmobile models in Rahway, NJ. Some manifolds may not have enough material and runner volume to match, but the Edelbrock Victor (PN 2812) does. With the racing we do, we spin the engine up to 9.500 rpm or more, and we needed a cylinder head that would handle the piston speed. 1970 Olds Cutlass S,9.5 to 1 358,Gen 3 Edelbrock,400Hp/Tq,Mahle 1mm pistons, Molnar rods,ARP,330 forged crank, 218/218 .541/.541 112 LSA roller cam, shorty headers,2.5" duals,X pipe, Superturbo's,2350 stall,TH2004R,3.08 Type "O". Quality is assured with 40 years experience in the Differential Industry and full involvement in all forms of motorsport from V8 SUPERCAR To Group 1 Drag Racing. So, which heads are the best performers, and how can you spot them? BEST OF ALL RAISED AND RELOCATED, SYMMETRICAL PORTS. Description RRP ROCKER STUD GIRDLES ARE AVAILABLE FOR ROCKET RACING CYLINDER HEADS. The after numbers look close to what everyone says these head flow, interesting. There are a number of head gaskets for the Oldsmobile engine. Estler's Mortgage Lifter tomato is one of the most popular heirloom varieties that is perfect for home gardeners. As the Oldmobile engine was offered in both small-block (9.330-inch deck height) and big-block (10.625-inch deck height) with no other changes to the basic architecture, the cylinder heads works on either combination without any issues. The ultimate setup in cylinder sealing is the copper head gasket with a stainless O-ring embedded into the cylinder head, with a corresponding receiver groove machined in the block. 0000001331 00000 n But what can we do to help? ALONG WITH DUCTILE IRON SEATS THAT ARE COMPATIBLE WITH TITANIUM VALVES. Pricing on the WPE Z head starts at $2,850 per pair for the Stage 1 design, with incremental prices increases as the user seeks to increase performance by choosing the Stage 2, 3 or 4 designs. Even at that small 46-cc level, the cylinder head seemed to have adequate deck thickness for the 640 hp that the particular engine produced. I dont know whether the power levels just happened to be greater on the aluminum-headed engine, making that the ultimate cause of failure, or the fact that the heads were made of aluminum. Copyright 1995-2023 Rocket Racing & Performance LLC. Stock-type steel big-block Oldsmobile valves are available through SBI and other sources and are relatively inexpensive. A Heads Shop is located at 4101 Bergen Turnpike, North Bergen, NJ 07047, A Heads Shop is open:Saturday: 8:00 AM - 8:00 AM Sunday: Closed Monday: 8:00 AM - 6:00 PM Tuesday: 8:00 AM - 6:00 PM Wednesday: 8:00 AM - 8:00 AM Thursday: 8:00 AM - 8:00 AM Friday: 8:00 AM - 8:00 AM. COMPLETE READY TO BOLT ON. In the early 1950s, before Joe was 17 years old, he had already ported & relieved more than 50 Ford flat head blocks for the finest engine builders of that era. These guys have alot of experience and helpful and cheap, Nirmal is a good guy with alit of experience, Worst experience nasty attitude doesn't take responsibility he has had my motor for 8 months for 30 over bore hot tank and flycutting pistons had to return motor 3 times found metal shavings in motor motor was dirty and stay away from nirmal stay away. Includes bowls and intake opening port match. They prefer warmer temperatures and drier, Take Action Now: How You Can Fight Climate Change and Protect Our Environment, The Effects of Climate Change on Our Environment For the more serious street application, the SuperStreet Series boasts high quality intake and exhaust valves and valve springs suited for daily drivers and tough street machines. WebShop Oldsmobile vehicles in Rahway, NJ for sale at Cars.com. Milling cylinder heads for increased compression is a relatively easy operation because Oldsmobile cylinder heads are square and can easily be cut without any special fixturing. Valve profiling and flow sheet included. TORRANCE, CA Edelbrock has heard the requests from the Oldsmobile faithful and is responding by releasing a new and improved Performer RPM Cylinder Head for the Big Block Oldsmobile V8. Having a decent port in the thing to where it would flow and work forced us to raise the intake port up 1.750-inch, and then we raised the exhaust port about the same. Throttle response and power range from 1500 - 6500 RPM. The heads are offered in four different configurations, from a basic CNC-chamber, CNC intake/exhaust port design that flows 340 cfm on the companys Superflow SF600 flowbench all the way up to the big-dog 400-plus cfm max-effort cylinder head designed for all-out racing applications. My question is how far can you port these heads? Heads come with 5 angle valve job. We'll be back on Monday, January 3. Bulletproof Big Blocks by Chris Hemer, Popular Hot Rodding If your 455 Olds needs a booster shot, then its time to call The Doctor. FEATURES INCLUDE: The only heads designed specifically to accommodate almost any CNC port configuration; Hot Isostatic Pressing castings available for increased strength and density; Cast in the USA at Edelbrocks state-of-the-art foundry