There is no replacement for displacement. Ford Racing 521 cid crate engines packs 580HP and 600ft./lbs. of torque! The Super Cobra Jet aluminum cylinder heads come complete with stainless steel swirl polished valves (intake 2.20" and exhaust 1.76") and dual-valve springs, retainers, keepers and seals. A solid roller mechanical camshaft provides significant horsepower increases above 3500 RPM and good low-end torque. Also includes a multi-index timing chain set, push rods, roller rocker arms, heavy duty HV oil pump, pickup tube, high-performance oil pan, Ford Racing valve covers, aluminum front cover and water pump, high-performance damper, flywheel, spark plugs, related long block engine parts and 4-Bolt block (.030'' over).

Features and Benefits: