1979-95 Ford Mustang 5.0L/5.8L Ford Racing Ford Racing GT40x Cylinder Head 64cc by Ford Racing

Mustang Ford Racing Ford Racing GT40x Cylinder Head 64cc (79-95) 5.0L/5.8L

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  • Ford Racing Mustang Ford Racing GT40x Cylinder Head (79-95) 5.0L/5.8L
Mustang Ford Racing Ford Racing GT40x Cylinder Head 64cc (79-95) 5.0L/5.8L

Increase horsepower in your 5.0L/5.8L Mustang with Ford Racing's aluminum GT40X cylinder head!

Item #M6049X306

Your Price: $599.00

Market Price:$659.00
You Save 10.02 % ($60.00)

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  • Increase Horsepower
  • Increased Torque
  • Reduced Weight


  • Aluminum Construction
  • 3-Angle Valve Job
  • Pedestal Mount Head
  • Fits Most 302(5.0L) Or 351(5.8L) Small Block Ford
  • 178Cc Pedestal Mount Cylinder Head with 64Cc Combustion Chamber

What's in the Box

  • (1) Cylinder Head

Made in the USA

Product Description

Ford Racing GT40X Cylinder Head
Add this Ford Racing GT40X cylinder head to your 5.0/5.8 Mustang motor for more horsepower and torque! These cylinder heads flow up to 185 CFM right out of the box! This cylinder head was designed to flow more air and create more performance for your Mustang! Adds up to 65 horsepower. Assembled with beehive springs. This head is sold individually. This Mustang cylinder head is NOT C.A.R.B. legal.

Technical Info
Brand: Ford Racing
Manufacturer's Part Number: M-6049-X306
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Combustion Chamber Volume (cc): 64cc
Intake Runner Volume (cc): 178cc
Exhaust Runner Volume (cc): 62cc
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Intake Valve Diameter (in): 1.940 in.
Exhaust Valve Diameter (in): 1.540 in.
Outside Diameter of Outer Spring (in): 1.500 in.
Number of Springs Per Valve: Single
Rocker Arms Included: No
Guideplate Pushrod Size: 5/16 in.
Accessory Bolt Holes Drilled: Yes
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Quantity: Sold Individually

Installation Notes
- Must use head bolt kit M6065D289 to install cylinder heads on 289/302 blocks
- Use intake gasket M9439A50
- Check rocker arm clearance to valve springs with production rocker arms.
- Check your intake manifold for port match, not all intakes are compatible due to the tall high-flow ports.
- Requires AGSP32C Motorcraft spark plugs.

- Fits 1979-1995 Mustang 5.0/5.8 Motors
- Will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief

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Product Reviews (1)

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1 of 1 REVIEWS
1 of 1 REVIEWS

5 Stars   Gt40X
By on 2/27/2014
Image uploaded by Jacob Stockdale Bought these and I can't wait to put the heart back in my fox the gt40X heads with 1.6 SVO roller rockers I'm excited

Yes, I would recommend this item to a friend!

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Vehicle Applications

Ford Mustang - 1979 (79) - 1980 (80) - 1981 (81) - 1982 (82) - 1983 (83) - 1984 (84) - 1985 (85) - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93) - 1994 (94) - 1995 (95)

About This Brand

Ford Racing
Ford Racing - Mustang Ford Racing Parts
Ford Racing is the leader in performance parts and accessories for Mustang and Ford Lightning.

LatemodelRestoration.com is proud to offer Ford Racing Performance Parts for your project. Ford Racing is dedicated to manufacturing the highest quality products offered in the industry. Choose from suspension, exhaust, wheels, and other performance parts at LatemodelRestoration.com. If you want the best for your Mustang or SVT Ligtning, look no further than Ford Racing Performance Parts!

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