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Ford Performance Turbo-Swirl GT40X Aluminum Head - 58CC Chamber (82-85 5.0L; 87-95 5.0L)

Market Price $689.99 You Save 13% ($90.00)
Our Price

$599.99 (each)

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  • Item 50542
  • MPN# M-6049-X307

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Bolt on 65 More Horsepower
  • Improved Air Flow Over Original GT-40 Heads
  • Combustion Chamber Volume 58cc
  • Intake Port Volume 178cc, Exhaust Port Volume 62cc
  • Lightweight Aluminum
  • Fully Assembled
  • Fits 1982-1985, 1987-1995 Windsor-Style 5.0L V8s
  • Sold Individually
More Power. Increase the horsepower and torque output of your push rod 5.0L engine with the Ford Racing Turbo-Swirl GT40X Aluminum Head. These GT-40X heads feature a 58CC Combustion Chamber to greatly improve the airflow over the original GT-40 design allowing you to bolt on 65 more horsepower.

Improved Air Flow. These Ford Racing GT-40X heads have an intake port volume of 178cc allowing for an intake flow of approximately 240 cfm at .550" lift (at 28" of H20) and an exhaust port volume of 62cc allowing for an exhaust flow of approximately 170 cfm at .500" lift (at 28" of H20). Machined for 1.94" Intake and 1.54" exhaust valve diameters.

Lightweight. Made from high quality original equipment style 356-T6 aluminum castings, each head weighs in at only 22 lbs. that is 25 lbs. lighter than the original cast iron GT-40 head, that is a weight savings of 50 lbs.

Fully Assembled. Leak tested prior to assembly, each Ford Racing Turbo-Swirl GT40X Aluminum Head comes fully assembled with M-6507-J302 intake valves, M-6505-G302 exhaust valves, and M-6513-A50 valve springs. As an added bonus the valve springs are compatible with all Ford Racing roller camshafts.

Installation Notes. Ford racing "X" heads are designed to use either GT-40 or aftermarket performance intake manifolds, M9439A50 intake gasket, and AGSF-32C spark plugs. Designed for bolt-down rocker arms part number M-6564-B351 for a 1.6 ratio or use part number M-6564-A50 for a 1.7 ratio.

Application. The Ford Racing Turbo-Swirl GT40X Aluminum Head is designed to be a direct bolt-on for the 1982-1985 and 1987-1995 5.0L Windsor-style V8 engines. It will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief.

Technical Note. Be sure to check your intake manifold for port match, because not all intakes are compatible due to the tall high-flow ports.

Fitment: 1982 1983 1984 1985 1987 1988 1989 1990 1991 1992 1993 1994 1995 Details

What's in the Box
  • (1) Assembled cylinder head
Installation Info
About The Brand

About Ford Performance

Ford Performance

Tech Specs
Will it fit my Mustang?
  • Cobra - 94, 95
  • Foxbody - 82, 83, 84, 85, 87, 88, 89, 90, 91, 92, 93
  • GT - 94, 95

Fits 5.0L Ford V8 engines. It will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief

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10 Questions / 6 Answers

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Are these heads smog legal, for California? Looks like it has the ports in the heads in the photos!

Greg

  • With the Ford Performance Turbo-Swirl GT40X Aluminum Head - 58CC Chamber (82-85 5.0L; 87-95 5.0L) we do not have a CARB E.O. number for this item. Ford Performance states on their site the following, "This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this art on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions." I would have to state that it is not smog legal in California. I would recommend contacting Ford Performance directly for any further information on that.

    SalC7

    Helpful (1)

Would these heads go with a B303 camshaft?

Neski24

  • These aluminum heads will be able to go with the B303 camshafts but there is one things to remember. The head is cut to 0.042" to bring the chamber down to the 58cc's and therefore the valves are closer to the piston than the X306's. There will need to be some modification done to make sure these will work in unison so there is no knocking.

    KevinD92

    Helpful (0)

trying to figure out the difference other than chamber volume on the 58 and 64 cc heads. like my set up is an edlebrock rpm intake, bbk short tubes, xenergey stage 2 cam , 24 lb injectors as far as parts attached to the head.. which head woul be best for my build

Jacks88LX5OH

  • You would be fine with the 58CC Chamber or the Ford Performance Turbo-Swirl GT40X Aluminum Head - 64CC Chamber (82-85 5.0L; 87-95 5.0L), item # 50241, (http://www.americanmuscle.com/frpp-turbo-swirl-gt40x-head.html). These heads are exactly the same except for the combustion chamber size. I would take into consideration what other mods you plan to do with the car before deciding on which heads to get.

    AshleyK

    Helpful (0)

I want to install these on my 90 LX, 5spd. Just need to now if they are smog legal!

Greg

  • Hi, These GT40x heads are not smog legal.

    Chris J

    Helpful (0)

Will the stock 1994 Cobra SVT intake bolt correctly to the 58cc chamber heads?

steveski

  • These Heads are designed to use either the GT-40 or aftermarket performance intake manifolds, M9439A50 intake gasket, and AGSF-32C spark plugs. They will not work with the stock intake. They are also designed for bolt-down rocker arms part number M-6564-B351 for a 1.6 ratio or use part number M-6564-A50 for a 1.7 ratio. You will need these parts in order to have a proper installation.

    AshleyK

    Helpful (0)

Will this work on an 86 5.0?

Mick

  • Hi, this Ford Racing Turbo-Swirl GT40X Aluminum Head will not fit a 1986 5.0L with flat-top pistons unless the pistons are notched for valve relief.

    Chris J

    Helpful (0)

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Customer Reviews (1) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Full Day

  • Performance Gain 5 5
  • Fit 5 5



  • 5/5

    Installation Time: Full Day

    January 16, 2015

    Ford Racing GT40X heads

    Ready to rock right out of the box with no additional parts needed besides gasket and head bolts. Direct bolt on for my 95 cobra 5.0 and worked with the factory 1.7 roller rockers. Felt the power instantly, can't wait to get it to the Dyno and see what the numbers say. Great product and made it to my doorstep super fast like always. Thanks AM

    BuellWillie

    Year: 1995 Submodel: Cobra La Vernia, TX 78121, USA

    Helpful (1)

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