302/351W "X-HEAD" ALUMINUM ASSEMBLED 64CC

This part is no longer available.
302/351W "X-HEAD" ALUMINUM ASSEMBLED 64CC

NEW AND IMPROVED, NOW ASSEMBLED WITH BEEHIVE SPRINGS AND HARDWARE FAST, EASY WAY TO BOLT ON 65 HORSEPOWER! TRUE BOLT-ON PERFORMANCE

  • For use on 289/302/351 Windsor-style engines
  • Intake flows approximately 240 cfm at .550" lift (at 28" of H20)
  • Exhaust flows approximately 170 cfm at .500" lift (at 28" of H20)
  • Machined for 1.94" Intake and 1.54" exhaust valve diameters
  • Ford Performance X-heads use either GT-40 or aftermarket performance intake manifolds. Check your intake manifold for port match; not all intakes are compatible due to the tall high-flow ports. Does not fit Ford Performance M-9424-Z51 or M-9424-Z51P intake manifolds.
  • Combustion chamber volume 64cc
  • Intake port volume 178cc, exhaust port volume 62cc
  • High temperature exhaust valve seats. Bronze guides.
  • Designed for bolt-on rocker arms, machined for gasket seat spark plug. Compatible with some Ford Performance intakes, headers, and valve train components.
  • High quality original equipment style 356-T6 aluminum castings, machining and components
  • Each aluminum head weighs approximately 22 lbs. approximately 25 lbs. lighter than each production cast iron head
  • These GT-40 style heads use AGSP-32C spark plugs
  • Each head is leak tested prior to assembly
  • Assembled with M-6507-J302 intake valves, M-6505-G302 exhaust valves, PAC® 1219X Ovateā„¢ Beehive valve springs.  Closed spring pressure is 145#@1.800"  358# @1.175".  Compatible with all Ford Performance roller camshafts and aftermarket hydraulic roller camshafts up to .600 lift.
  • Feature 10-degree locks, steel valve spring retainers and stock valve seals
  • Designed to be used on Ford Performance Boss blocks M-6010-BOSS302, M-6010-B302BB, M-6010-BOSS35195M-6010-BOSS35192 and M-6010-BOSS351BB blocks. Head Bolts M-6065-BOSS or Head Stud Kit M-6014-BOSS and Head Gasket M-6051-CP331/S331, or Big Bore application M-6051-R351 recommended.
  • Must use head bolt kit M-6065-D289 to install cylinder heads on 289/302 production blocks or head bolt and head gasket kit M-6051-A50
  • Designed for bolt-down rocker arms part number M-6564-B351 for a 1.6 ratio. Use part number M-6564-A50 for a 1.7 ratio. Check rocker arm clearance to valve springs with production rocker arms
  • Uses Felpro® exhaust gasket part number 1415
  • NOTE: Will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief



Part Type
Engine: Cylinder Heads
Warranty Availability
Not Available
Package Dimensions
9" x 7.5" x 23"
Package Weight
26.7 lb(s)
UPC Code
756122099957
Country of Origin
United States