The small block Ford Z2 aluminum cylinder head features an advanced “Velocity Vane” intake port design that delivers outstanding street/strip power.  Developed with the aid of advanced computer aided engineering simulation tools, the unique design improves power throughout the RPM range.  This high performance aluminum cylinder head is a direct bolt on for Ford 289/302/351W engines and retains OEM exhaust, intake, and accessory mounting locations.

View the dyno test results here:  Z2 Head Dyno Test Graph

  • Fits 289/302/351 Windsor engines
  • Cast from prime 356 T6 aluminum
  • Heads retain Ford OEM intake and exhaust port location and flange
  • Intake ports feature a unique “Velocity Vane” in port floor to direct airflow around the valve stem – that leads to more HP and torque throughout the full power range
  • 20° degree inline valve angle
  • Premium stainless steel valves - 2.05" intake - 1.60" exhaust  
  • PAC 1219X conical style valve springs with machined retainers and 10° machined valve locks. Most hydraulic cams can be used with these springs.
  • Valve spring closed pressure - 145 lbs. @1.800"
  • Valve spring open pressure - 358 lbs. @ 1.175"
  • Coil Bind @1.100”   0.650” Max Lift.
  • Includes laser cut guide plates for use with 5/16" pushrods and 7/16" rocker studs
  • Steel alloy intake and exhaust valve seats
  • Manganese-bronze valve guides
  • 63cc combustion chamber
  • Uses gasket style 14mm spark plugs 
  • Uses small block Ford 7/16 stud mount, 1.65 ratio rocker arms
  • Check piston to valve clearance including radial valve clearance before installing these cylinder heads on your engine
  • Uses Intake gasket - M-9439-A50 and FelPro exhaust gasket part number 1415

Part Type
Engine: Cylinder Heads
Instruction Sheet
Warranty Availability
Not Available
Package Dimensions
8.5" x 11.5" x 26"
Package Weight
31.85 lb(s)
UPC Code
Country of Origin
United States