Ford Racing M9424P46 Intake Manifold Production composite intake manifold used on 2001-2004 4.6L SOHC 2V Mustang GT Manifold fits 1999-2004 Power Improvement (PI) head ports For Off Road Use Only, can be used on 1996-1998 engines with Performance Improvement (PI) heads, custom calibration required Additional modifications and parts required Requires intake gasket set 4C3Z-9439-CA available from your local Ford Dealer