engine components 4.6l performance improvement pi intake manifold m-9424- ... expensive alternative to aftermarket performance intake manifolds for pi head swaps · ... · can be used on 1996-98 engines with performance improvement pi heads · additional ... modifications and parts required hi-flow 70mm throttle body m-9926-d462 1996-04 ... m-9926-d462 throttle body ford racing performance parts used ford racing supplied body in ...