Ford Performance Parts Z2 Velocity Vane Cylinder Heads

Ford Performance Parts Z2 Velocity Vane cylinder heads improve power throughout the rpm range. Developed with advanced computer-aided engineering simulation tools, Ford Z2 aluminum heads feature their unique Velocity Vane intake port design that delivers outstanding street/strip power. These high performance cylinder heads are direct bolt-ons for Ford 289/302/351W engines, and they retain OEM exhaust, intake, and accessory mounting locations.

Ford Z2 Velocity Vane cylinder head specs:

* Cast from prime 356 T6 aluminum
* Heads retain Ford OEM intake and exhaust port location and flange
* Velocity Vane in port floor directs airflow around the valve stem, leading to more horsepower and torque throughout the full power range
* 20 degree inline valve angle
* Premium stainless steel valves: 2.05 in. intake, 1.60 in. exhaust valves
* PAC 1219X conical-style valve springs with machined retainers and 10 degree machined valve locks--most hydraulic cams can be used with these springs
* Valve spring closed pressure: 145 lbs. at 1.800 in.
* Valve spring open pressure: 358 lbs. at 1.175 in.
* Coil bind at 1.100 in., 0.650 in. max lift
* Includes laser-cut guide plates for use with 5/16 in. pushrods and 7/16 in. rocker studs
* Steel alloy intake and exhaust valve seats
* Manganese-bronze valve guides
* 63cc combustion chamber Show Less