Ford Racing Cylinder Head Assembled Z2 5.0L/5.8L Windsor 016440NRAZ The Pro-Flo XT 289/302 EFI

The Pro-Flo XT 289/302 EFI intake manifold has a large plenum and long tapered runners to deliver maximum horsepower and broad torque band throughout the rpm range

Hyper-Flex(TM) performance polyurethane bump stops for control arms

1971-1973 Pontiac Bonneville

6 AN Female O-Ring Return

166 lb/in Spring Rate

Ford Racing Cylinder Head Assembled Z2 5.0L/5.8L Windsor 016440NRAZ The Pro-Flo XT 289/302 EFICylinder Head Retains Ford OEM Intake Exhaust Port Location 20 Degree Inline Valve Angle Premium Stainless Steel Valves; 2. 05 in. Intake 1. 60 in. Exhaust 145 lbs. @ 1. 80 in. Valve Spring Closed Pressure 358 lbs. @ 1. 175 in. Valve Spring Open Pressure Coil Bind at 1. 100 in.; 0. 650 in. Max Lift Steel Alloy Intake Exhaust Valve Seats Manganese Bronze Valve Guides 63cc Combustion Chamber Made in the USAFord Racing offers a variety of products for