Gt40x Heads 58ccFord Performance GT40 X2 Aluminum Assembled Cylinder Head M-6049-X2 NEW AND IMPROVED "X2" CYLINDER HEAD IS MANUFACTURED FROM ALL-NEW TOOLING, MACHINED, AND ASSEMBLED WITH PREMIUM HARDWARE. It also had a more drag oriented suspension and ran a 1. If stock compression on 64cc heads is 9. Each GT-40X head is leak tested prior to assembly. I would rather pay $500 for some GT40P heads that already flow 200cfm unported and clean the exhaust side up. Ford 289 302 351W 408 427 5. The benefit you have with a bare setup is; you can have the valves custom seated with a nice back cut. Ford Racing's GT-40X Cylinder Heads Install - Hustle And Flow Finding quicker elapsed times and more horsepower using Ford Racing's GT-40X cylinder heads. At 64cc the compression is about 9. 0L/302 Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Cylinder Heads, Competition, Aluminum, Assembled, 58cc Chamber, 220cc Intake, Ford, Small Block, Pair. 3) Use a Track Heat or something like it. Better plug placement and needs correct headers because of plug placement. The GT-40X heads are a pretty good quality head - order them through Summit Racing for the best price if you don't already have them. 0 Top End Kit Aluminum Heads GT40 EFI carburetor + $175. The GT40 cylinder heads quickly gained a reputation as being “Yard Gold,” the type of thing that only enthusiasts knew to poke around for in a scrapyard and could pick up for a song. 1) Go with a set of AFR 185 heads or something similar. Ford 289 302 351W 408 427 5. FFR 4 into 4's aren't an issue. GT-40 Aluminum Cylinder Head INSTALLATION INSTRUCTIONS NO PART OF THIS DOCUMENT MAY BE REPRODUCED WITHOUT PRIOR AGREEMENT AND WRITTEN PERMISSION OF FORD RACING PERFORMANCE PARTS. See page 99 for complete list of valve train. Giving new life to GT40X heads. 351W questions and concerns. You can buy a set of springs that match your cam. If not the 58cc combustion chamber heads will give you a slight bump in compression. In Stock Afr Sbf 220cc Cnc Ported Aluminum Cylinder Heads 58cc 363 351w 408 427 $2935. 00 (10% off) No Interest if paid in full in 6 mo on $99+* Buy It Now. gt40 aluminum heads for sale. gt40x heads for sale | eBay heads heads heads Category Cylinder Heads Brand Brand Type Shipping Options Local Pickup Show only All Listings Accepts Offers Auction Buy It Now 2 results for gt40x heads Save this search Update your shipping location Shop on eBay Brand New $20. AFR 185cc Cylinder Heads - 58cc Chambers (79-95) 5. The GT40X was the only 1. Ford Gt40x SVO Aluminium Cylinder Heads 64cc Chamber. 0 Mustang Aluminum Heads GT40 EFI carburetor 58CC Item Information Condition: NewNew Quantity: More than 10 available Price: US $1,529. The GT40X heads are good heads, but not up to the level of TrickFlow heads. The cc size is cubic centimeters in reference to the combustion chamber in the head, and coupled along with the piston top (dished, flat top, domed) and the head gasket thickness will determine compression ratio. 69:1 static compression using ricer math. 0L engine with the Ford Racing Turbo-Swirl GT40X Aluminum Head. 99 View Item Details Oem New Ford Racing 302351w Z-head Aluminum - Assembled 63cc M6049z304da $1760. Understanding Ford's Fox Body GT40 Cylinder Heads. $2,300. ARP 254-3708 - ARP Pro Series Cylinder Head Bolt Kits - Overview - SummitRacing. Save gt40x heads to get e-mail alerts and updates on your eBay Feed. What's the difference between 58cc and 64 cc heads?. AFR165 Dyno Results vs GT40X. 0l Ford Racing Gt40x Aluminum Cylinder Head M-6049-x306 64cc New $1000. Joined: Tue Mar 27, 2007 10:56 pm. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. Using the Keith Black compression calculator on their website I use 58cc heads, flat top pistons with 6. The performer and performer RPM are the same except that the RPM Lacks emissions. Head assembly consists of bare head M-6049-X302/X304 and GT-40 valve train kit M-6090-X302. Trying to defend the GT40 heads are you? Well - on a basic 306 with 4cc valve relief piston and zero deck is about 9. Always pulled 300HP to the crank and between 230-250 RWHP depending on if I had a low stall converter and a. GT-40X heads with 58cc combustion chamber 5109 Views 8 Replies 5 Participants Last post by n2omike , Jan 26, 2002 D Dean Justice Discussion Starter · Jan 25, 2002 Does anybody know if theses heads are good? I'm about to start building up a 302 roller motor and I want somewhere in the upper 300's in horse power. 95 View Item Details In Stock Afr 1451 Sbf 220cc Cnc Ported Aluminum Cylinder Heads 58cc Hydraulic $3199. 0L Ford Racing GT40X Aluminum Cylinder Head M-6049-X306 64cc New +$50. 27 AFR 205cc Renegade Cylinder Heads - 58cc Chamber (79-95) 5. These GT-40 style heads use AGSF-32C spark plugs. These GT-40X heads feature a. Ive always run the Ford Lightning 5. The GT40 aluminum heads are a middle of the road aluminum head in terms of flow. Ford Performance Camshafts- E303, B303, F303, X303; Anderson Ford- N/A specs are not advertised; Trick Flow - Stage 1, Stage 2 , Stage 3; Comp Cams- CCA-355148, CCA-355228; Maximum Valve Lift:. Specs are as follows: 62 falcon- 306 windsor, xe262h flat tappet, x306 58cc heads, edelbrock rpm airgap, 600 holley vac, shorty headers, msd 6a, twin 2. Giving new life to GT40X heads. lighter than each production cast iron head Each head is leak tested prior to assembly Specifications: Combustion chamber volume 64cc Intake port volume 188cc Exhaust port volume 63cc Intake flows approximately 230 cfm at. Increase the horsepower and torque output of your push rod 5. Light weight – approximately 22 lbs assembled with Ford Racing components Excellent out-of-the-box flow characteristics Excellent potential for improving flow with porting O. 0L Ford Racing GT40X Aluminum Cylinder Head M-6049-X306 64cc New Brand New C $1,343. 0LX, Gt40X 64cc heads, E303 Cam, 1. 0L engine with the Ford Racing Turbo-Swirl GT40X Aluminum Head. Part Type: Cylinder Head Application: Ford Small Block Cylinder Head Material: Cast Iron Bare or Assembled: Assembled (by Competition Products) Combustion Chamber Size: 58cc CNC Machined Combustion Chambers: No Intake Valve Angle: 20 Exhaust Valve Angle: 20 Intake Port Volume: 180cc CNC Machined Intake Port: No Intake Port Flow:. Do you already have the heads? If not the 58cc combustion chamber heads will give you a slight bump in compression. The GT40X head has a thicker deck surface making them better for power adders and milling. 0L Ford Racing GT40X Aluminum Cylinder Head M-6049-X306 64cc New Brand New $1,000. Always pulled 300HP to the crank and between 230-250 RWHP depending on if I had a low stall converter and a valvebody in the AOD. Are Powerheads better than GT. He said that the GT40X M-6049-X302/3 (64cc) heads and the M-6049-X304/5 (58cc) heads are the same castings. GT40X Head Identification. at 6psi, the car made 394hp and 411lb/ft to the wheels. 5 to 1 as I don't have zero deck height and only cheap cast 4 valve relief pistons. STEP 4: Install the GT-40 heads on engine block and install mounting bolts. Hey guys i have a set of X 305 SVO Aluminum heads and i am wanting to install them on my 95 GT. lighter than each cast iron GT-40 head. That's something most people wouldn't lie about. Techline 1-800-367-3788 Page 1 of 3 IS-1850-0305 Factory Ford shop manuals are available from Helm Publications, 1-800-782-4356. 00 or Best Offer Sponsored See search results that fit your vehicle. Camshaft selection for GT40X heads. 62 falcon- 306 windsor, xe262h flat tappet, x306 58cc heads, edelbrock rpm airgap, 600 holley vac, shorty headers, msd 6a, twin 2. AFR 185cc Cylinder Heads - 58cc Chambers (79-95) 5. STEP 3: Position the new cylinder head gasket over the guide dowels on the engine block. Using the Keith Black compression calculator on their website I use 58cc heads, flat top pistons with 6. The relevant mods are GT40X heads (58cc with mild port blending), GT40 upper and lower intake, Compucam 2031, 1. 0TailPipeHump Member Dec 5, 2006 153 0 17 Mar 23, 2009 #3 Wierd, i have the same head and was under the impression that the x302 were 64cc,. Ford Performance GT40 X2 Aluminum Assembled Cylinder Head M-6049-X2 NEW AND IMPROVED "X2" CYLINDER HEAD IS MANUFACTURED FROM ALL-NEW TOOLING, MACHINED, AND ASSEMBLED WITH PREMIUM HARDWARE. M-6049-X305* Complete Head (58cc Chamber) THE FAST, EASY WAY TO BOLT-ON 65 HORSEPOWER! TRUE BOLT-ON PERFORMANCE For use on 289/302/351 Windsor-style engines. Ford Gt40x SVO Aluminium Cylinder Heads 64cc Chamber X302. Gt40x SVO Aluminium Cylinder Heads 64cc Chamber. FMS-M-6049-X305 is the 58cc head there is also an X304 part number that is sold as a bare head, but I do not know the chamber size. by F-BIRD'88 » Sat Apr 15, 2017 9:19 pm. World Products, Windsor Jr. These GT-40X heads feature a 64CC Combustion Chamber to greatly improve the airflow over the original GT-40 design allowing you to bolt on 65 more horsepower. 58cc ">World Products, Windsor Jr. GT-40X heads with 58cc combustion chamber 5109 Views 8 Replies 5 Participants Last post by n2omike , Jan 26, 2002 D Dean Justice Discussion Starter · Jan 25, 2002 Does anybody know if theses heads are good? I'm about to start building up a 302 roller motor and I want somewhere in the upper 300's in horse power. Part Type: Cylinder Head Application: Ford Small Block Cylinder Head Material: Cast Iron Bare or Assembled: Assembled (by Competition Products) Combustion Chamber Size: 58cc CNC Machined Combustion Chambers: No Intake Valve Angle: 20 Exhaust Valve Angle: 20 Intake Port Volume: 180cc CNC Machined Intake Port: No Intake Port Flow:. The GT-40X heads are a pretty good quality head - order them through Summit Racing for the best price if you don't already have them. Ford Performance Camshafts- E303, B303, F303, X303; Anderson Ford- N/A specs are not advertised; Trick Flow - Stage 1, Stage 2 , Stage 3; Comp Cams- CCA-355148, CCA-355228; Maximum Valve Lift:. 42 1979-93 Mustang Ford Performance Cylinder Heads Ford Performance X2 Street Cruiser Cylinder Heads (79-95) 5. In Stock Afr Sbf 220cc Cnc Ported Aluminum Cylinder Heads 58cc 363 351w 408 427 $2935. GT-40p - Newer school iron heads. These GT-40X heads feature a 64CC Combustion Chamber to greatly improve the airflow over the original GT-40 design allowing you to bolt on 65 more horsepower. com">Camshaft selection for GT40X heads. -gt40X heads (58cc combustion chamber) -b303 -SSI intake -76mm MAF (I have both tubes, 19lb is in now) Hey dudes/dudettes, My 93 notch is now fully operational (it was timing and a couple of tight rockers). M-6049-X305* Complete Head (58cc Chamber) THE FAST, EASY WAY TO BOLT-ON 65 HORSEPOWER! TRUE BOLT-ON PERFORMANCE For use on 289/302/351 Windsor-style engines Improved air flow over original GT-40 aluminum heads Intake flows approximately 240 cfm at. How Cylinder Heads Impact Performance. GT-40p - Newer school iron heads. 71 shipping estimate from United States Sponsored 1987-1995 Ford Mustang 5. com">Gt40x heads with a stock cam. I'm running the stock fuel pump and 19lb injectors The car is running fine. The bigger the cc of the head chamber, the lower the compression. Adam Ron Earp Admin Jul 7, 2003 #3 I have used the Y and X heads - you'll do better with AFRs, Trick Flow, etc. Ford Racing GT40X Cylinder Heads 58cc 1. THIS PROVIDES A FAST, EASY WAY TO BOLT ON SIGNIFICANT HORSEPOWER TO YOUR STREET CRUISER PACKAGE! For use on 289/302/351 Windsor-style engines. THE LINCOLN MARK VII CLUB • View topic. 042 head gasket, and the pistons are just. That explorer intake is for a 302 in a truck and won't fit a 351 without spacers. Steve Baur Writer Jun 1, 2008 See all. Ford Racing's GT-40X Cylinder Heads Install - Hustle And Flow Finding quicker elapsed times and more horsepower using Ford Racing's GT-40X cylinder heads. 00 Flo-Tek 203505 Single Small Block Ford SBF 289 302 Aluminum Cylinder Head 58cc Free 2 day shipping NEW PERFORMANCE 289-302-351W FORD CYLINDER HEADS SBF 2. HCI setup with 19lb injectors?. 00 View Item Details Ford Racing M6049-z2 Cylinder Head Z2 Velocity Vane Aluminum Assembled 63cc $1369. Heads: With the GT40X heads, can the small chamber 58cc be used with the E cam and not have piston to valve clearance problems with the factory pistons and. 99 What does this price mean? Recent sales price provided by the seller Save US $170. Mustang Cylinder Head & Camshaft Guide (79. whats the power difference gt40 vs gt40x heads. 00 shipping Select Vehicle Hover to zoom Have one to sell?. gasket matching / gt40x heads. No trees were killed in the sending of this message. item 1 Ford Mustang 5. Re: Giving new life to GT40X heads. 94" valve tested in group 2 so I would have put it group 1. Find many great new & used options and get the best deals for Ford Gt40x SVO Aluminium Cylinder Heads 64cc Chamber X302 Scorpion Rockers at the best online prices at eBay!. What all to do with the SVO X305 Aluminum Head Install. Smaller CC than the GT-40 for higher compression (if you need or want more compression) GT-40X - Aluminum heads Each aluminum head weighs approximately 22 lbs. Does anyone know if these are the GT40P style that need specific headers?. These GT-40 style heads use AGSF-32C spark plugs Each GT-40X head is leak tested prior to assembly Head assembly consists of bare head M-6049-X302/X304 and GT-40 valve train kit M-6090-X302 featuring stainless steel valves. Ford Gt40x SVO Aluminium Cylinder Heads 64cc …. I am finishing off a 302E cam, std bore, GT40X heads (58cc), roller rockers, 10:1 complooking for better than average street, no racing. Smaller CC than the GT-40 for higher compression. Performance GT40 X2 Aluminum Assembled ">M. Which GT40 heads should i use on a 94 GT?. Even good aluminum heads do not stand up to a blower the way iron will. Get the best deals for gt40 aluminum heads at eBay. Ed See more Reply Save Like C CAPTDON · #8 · Feb 22, 2005. 00 shipping Ford 289 302 332 347 427 5. Heads: With the GT40X heads, can the small chamber 58cc be used with the E cam and not have piston to valve clearance problems with the factory pistons and using the recommended ford racing head gaskets for these heads?. Save gt40x heads to get e-mail alerts and updates on your eBay Feed. 1) Go with a set of AFR 185 heads or something similar. In the Ford performance circles the GT40X cylinder head is viewed as a mediocre entry level head. Year Make Model Trim Engine Add vehicle Ford 289 302 351W 408 427 5. 180 Cast Iron Ford SB Head, 58cc. Do not use the parts off your old heads. Looks like I may be purchasing a set of pistons. 58cc heads or 64cc, which one to get? 6636 Views 6 Replies 6 Participants Last post by 895. 85:1 static with a 58cc head. Most people are not zero deckthe last 2 motors I checked before tearing apart where between. M-6049-X305* Complete Head (58cc Chamber) THE FAST, EASY WAY TO BOLT-ON 65 HORSEPOWER! TRUE BOLT-ON PERFORMANCE For use on 289/302/351 Windsor-style engines Improved air flow over original GT-40 aluminum heads Intake flows approximately 240 cfm at. heads">THE LINCOLN MARK VII CLUB • View topic. The Edel Performers share the same port with differences for valve size and emmissions. 0L Ford Racing GT40X Aluminum Cylinder Head M-6049-X306 64cc New Ford Mustang 5. Which GT40 heads should i use on a 94 GT? Thread starter BeeX; Start date Jan 1, 2010; BeeX Member. Ford Racing GT40X Cylinder Heads 58cc 1. The cc size is cubic centimeters in reference to the combustion chamber in the head, and coupled along with the piston top (dished, flat top, domed) and the head gasket thickness will determine compression ratio. 0L engine with the Ford Racing Turbo-Swirl GT40X Aluminum Head. 0 Mustang Aluminum Heads. The 2nd car was many years later, came with X-heads, a GT40 intake, E-cam, 30 lbs injectors, Pro-M 75mm bullet, 1. Trickflow, AFR, Edebrock,and Dart all offer superior castings to the GT40X from Ford Performance. GT-40X heads with 58cc combustion chamber 5109 Views 8 Replies 5 Participants Last post by n2omike , Jan 26, 2002 D Dean Justice Discussion Starter · Jan 25, 2002 Does anybody know if theses heads are good? I'm about to start building up a 302 roller motor and I want somewhere in the upper 300's in horse power. 0L Ford Racing GT40X Aluminum Cylinder Heads COBRA 302 Pre-Owned C $2,350. Gt40x heads with a stock cam. Each aluminum head weighs approximately 25 lbs. Ford Racing GT40X Cylinder Heads 58cc 1. Torque in 3 steps using the shown in Figure 1. The valve springs are compatible with all Ford Racing roller camshafts. 042 head gasket, and the pistons are just a touch in the hole at. A blower is all about flow and it is the great equalizer in your engine design. Increase the horsepower and torque output of your push rod 5. 351w, gt40x, f303 worth doing. These GT-40 style heads use AGSF-32C spark plugs Each GT-40X head is leak tested prior to assembly Head assembly consists of bare head M-6049-X302/X304 and GT-40 valve train kit M-6090-X302 featuring stainless steel valves. IN STOCK Trick Flow 432 HP Twisted Wedge 11R Top. Does anyone know if these are the GT40P style that need specific headers? Anyone got any thoughts on if these are good heads for a mild street 351W that I want to get about 375 hp and some decent torque out of for my 56 F100. Do you already have the heads? If not the 58cc combustion chamber heads will give you a slight bump in compression. 58cc heads or 64cc, which one to get?. FMS-M-6049-X305 is the 58cc head there is also an X304 part number that is sold as a bare head, but I do not know the chamber size. The tech didn't recommend cutting beyond 58cc with a flat mill. These GT-40X heads feature a 64CC Combustion Chamber to greatly improve the airflow over the original GT-40 design allowing you to bolt on 65 more horsepower. Shipping 22 results for gt40 aluminum heads Save this search Shipping to: 23917 Shop on eBay Brand New $20. Find many great new & used options and get the best deals for Ford Gt40x SVO Aluminium Cylinder Heads 64cc Chamber X302 Scorpion Rockers at the best online prices at eBay! Free shipping for many products!. Installation of new guide dowels may be needed. 1987 Notchback - N/A stock 302, TFS heads, Holley Systemax, FTI. 5" system, C4, 2500rpm stall, 3. n/a the car made 298hp and 314lb/ft to the wheels. 0TailPipeHump Member Dec 5, 2006 153 0 17 Mar 23, 2009 #3 Wierd, i have the same head and was under the impression that the x302 were 64cc,. I see in the Jegs flyer some Ford Racing GT40X alum. The bigger the cc of the head chamber, the lower the compression. -gt40X heads (58cc combustion chamber) -b303 -SSI intake -76mm MAF (I have both tubes, 19lb is in now) Hey dudes/dudettes, My 93 notch is now fully operational (it was timing and a couple of tight rockers). 8L intake, GT40X aluminum heads 58cc, 1. M-6049-X304* Bare Head (58cc Chamber) M-6049-X305* Complete Head (58cc Chamber) THE FAST, EASY WAY TO BOLT-ON I think you'll be fine with the gt40 intake considering you have gt40x heads. 00 or Best Offer Sponsored Find parts that fit We need more information about your vehicle to confirm fit. GT40X is rated to flow 250 CFM vs. Ive always run the Ford Lightning 5. Body Mustang Cylinder Heads & Accessories. 62 falcon- 306 windsor, xe262h flat tappet, x306 58cc heads, edelbrock rpm airgap, 600 holley vac, shorty headers, msd 6a, twin 2. All heads have 1. 550" lift (at 28" of H20) Exhaust flows approximately 170 cfm at. 0, changing to 58cc heads will yield approx. 7 roller rockers, cobra upper and lower intake manifold, 70mm throttle body, 70mm maf for 24lb inj, bbk fuel rails, 24lb inj, msd ignition set up, bbk Shorty headers, Mac catless x pipe, flowmaster catback, vortech. He said that the GT40X M-6049-X302/3 (64cc) heads and the M-6049-X304/5 (58cc) heads are the same castings. Ford Mustang 5. Which GT40 heads should i use on a 94 GT? Thread starter BeeX; Start date Jan 1, 2010; BeeX Member. 0 Mustang Aluminum Heads GT40 EFI carburetor 58CC. 0L engine with the Ford Racing Turbo-Swirl GT40X Aluminum Head. At a guess my comp would be pretty crap like 8. Using the Keith Black compression calculator on their website I use 58cc heads, flat top pistons with 6. Look at Comp or Crane and you pick the cam after you've selected all the other stuff including the rear gears. 00 View Item Details Ford Racing Super Cobra Jet Cylinder Head M-6049-scja $1499. From my Intake manifolds - Club Cobra. This yields around 9:2 cmpression. You'd have to cc the chambers to make sure they're 58cc heads, but I'm sure that's what you got if you ordered them from a reputable source, or got them from someone who had done the same. Opens in a new window or tab Ford 289 302 347 351 408 427 5. X2" STREET CRUISER ASSEMBLED ALUMINUM CYLINDER HEAD ">302/351W "X2" STREET CRUISER ASSEMBLED ALUMINUM CYLINDER HEAD. 83 60' on a 225 all-season stock sized Goodyear. Smaller "P" valves (Same part# from 96-01 on all V8 explorers, regular GT40's have different part numbers), smaller 58cc combusion chambers ( higher compression) compared with 64cc on GT40, and regular spark plug angles, 96 Explorers have unique exhaust manifolds compared with 97-01. Not by much, but enough that there is no incentive to lie about it. 8L intake, GT40X aluminum heads 58cc, 1. The GT40 aluminum heads are a middle of the road aluminum head in terms of flow. heads should i use on a 94 GT?. These GT-40 style heads use AGSF-32C spark plugs Each GT-40X head is leak tested prior to assembly Head assembly consists of bare head M-6049-X302/X304 and GT-40 valve train kit M-6090-X302 featuring stainless steel valves. All those entry level aluminum heads cost about the same, and the GT-40x is arguably the lowest performer of those heads. Upgrading Fox Body Mustangs to GT40 heads became a popular modification. Even good aluminum heads do not stand up to a blower the way iron will. 042" off the 64cc heads to. 042" off the 64cc heads to tighten them up to 58cc. 6 RRs, 70mm BBK TB (whistles, don't buy), off-road H, pullies, & 4. How to identify GT40x heads??. 0 Mustang Aluminum Heads GT40 EFI carburetor Brand New. The cc size is cubic centimeters in reference to the combustion chamber in the head, and coupled along with the piston top (dished, flat top, domed) and the head gasket thickness will determine compression ratio. Trying to defend the GT40 heads are you? Well - on a basic 306 with 4cc valve relief piston and zero deck is about 9. Light weight – approximately 22 lbs assembled with Ford Racing components Excellent out-of-the-box flow characteristics Excellent potential for improving flow with porting O. the combo is a gt40 tubular intake, gt40x heads, and a. 72 rockers, and BBK shorty headers into the stock H-Pipe with all four cats then into magnaflow V6 mufflers and dumped right after the mufflers. The Ford aftermarket is in full swing. 72 Crane roller rockers, 65mm throttle body, Kirban afpr at 42 psi (without vauum), 24lb injectors, stock fuel rail, Walbro 255 lph in tank pump, C&L 75mm MAF with blue sample tube, C&L intake elbow, stock airbox, complete. If they are aluminum, you can pretty safely assume that it has the GT-40x heads like you were told. 35 Top Rated Seller Buy It Now +C $212. 302/351W "X2" STREET CRUISER ASSEMBLED ALUMINUM CYLINDER HEAD. 86 Top Rated Seller Buy It Now Shipping not specified. Heads: With the GT40X heads, can the small chamber 58cc be used with the E cam and not have piston to valve clearance problems with the factory pistons and using the recommended ford racing head gaskets for these heads? 2b) Or should I stay with the larger chamber heads?. Ford Racing's GT-40X Cylinder Heads Install - Hustle And Flow Finding quicker elapsed times and more horsepower using Ford Racing's GT-40X cylinder heads. 00 shipping Best Selling in Cylinder Heads. GT40 X2 (Xtwo) cylinder heads. Ford Racing Aluminum Heads. Find many great new & used options and get the best deals for Ford Gt40x SVO Aluminium Cylinder Heads 64cc Chamber X302 Scorpion Rockers at the best online prices at eBay! Free shipping for many products!. quality castings and machining Uses production rockers and pedestals Excellent cooling characteristics Excellent chamber combustion characteristics Integral spring seats ….