Description
Cast from prime A356 T6 aluminum, these 'Z' heads from Ford Racing were designed using solid modeling technology. They feature high-flow ports and steel alloy intake and exhaust valve seats installed (they do require a competition valve job and bowl blending). The manganese-bronze valve guides are installed with a semi-finished I.D. and the combustion chambers are CNC-machined. Laser-cut guideplates are included, and they accept both tapered seat and gasket-style 14mm spark plugs.
Installation Instructions
Installation Instructions
- 145 lbs. 1.80 in. Valve Spring Closed Pressure
- 358 lbs. 1.175 in. Valve Spring Open Pressure
- Steel Alloy Intake/Exhaust Valve Seats
- 85cc Exhaust Port Volume As Cast
- 204cc Intake Port Volume As Cast
- Heads are Cast w/High Flow Ports
- Cast From Prime A356 T6 Aluminum
- Manganese-Bronze Valve Guides
- 63cc CNCd Combustion Chamber
- 20 Degree Inline Valves
- Made in the USA
