Porting these parts removes material and flow restrictions providing more balanced flow and improved chamber filling. This results in better performance and efficiency even fuel economy can benefit. Originally developed for Pettit Racing’s engine program back in 1994 and still popular with both road and drag racers today.

This is the same basic manifold used on our race car that competed Professionally for over 20 years and won the 1998 GT-2 Championship. 

All porting is done on an Exchange Basis ONLY. If you do not have a core, $245 will be applied and refunded when a good useable core is returned.