Ford Mustang Resources -P

Professional Products - Affordable alterative parts distributor.

Powerdyne - Centrifical Superchargers.

Paxton - Higher quality than the powerdyne units and more HP Potential Centrifical Superchargers.

Proformanceunlimited (Stroker engine builders) some sweet videos of powerful stroker motors running.

Pro Turbo Kits Pro Turbo Systems

Performance Parts Inc. - Dated looking website, still a mature parts vendor on the corral message board.