Overview

Ford Performance Parts Z-Head Aluminum Cylinder Heads

Ford Performance Parts Z-Series aluminum cylinder heads provide increased intake and exhaust airflow and are available for Ford small block Windsor engines. They were designed using solid modeling technology from prime A356 T-6 aluminum and feature high-flow ports, steel alloy intake and exhaust valve seats, and manganese-bronze valve guides. Ford Z-Series heads accept both tapered seat and gasket-style 14mm spark plugs and are available as-cast or CNC-ported, both bare and assembled.

Select heads are also offered with advanced "Velocity Vane" intake port design that delivers outstanding street/strip power. Developed with advanced computer-aided engineering simulation tools, their unique intake port design improves power throughout the rpm range. Velocity Vane cylinder heads are a direct bolt-on and retain OEM exhaust, intake, rocker arm, and accessory mounting locations.

Features include (some vary depending on version):

* A variety of combustion chamber volumes
* Cast with high-flow ports
* 20 degree inline valves
* Steel alloy intake and exhaust valve seats
* 7/16 in. screw-in studs (not included on bare heads)
* Requires 1.5:1 ratio roller rocker arms with .150 in. offset intake pushrod cup (not included)
* Assembled heads include laser-cut guide plates for 5/16 in. pushrods and 7/16 in. rocker studs
* Premium stainless steel intake and exhaust valves (with assembled heads)

Notes:

* As-cast bare heads require competition valve job and bowl blending
* Custom headers may be required for heads with raised exhaust port exits
* Check intake manifold for port match; not all intakes are compatible due to the tall high-flow ports (does not fit M-9424-Z51/-Z51P)
* Check piston-to-valve clearance, including radial valve clearance, before installing

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