1-5/8" Stainless Headers. 2003-2004 Mercury Marauder 4.6L 4V 1987-pontiac-firebird-esi3246161 Very minimal cutting is required

Very minimal cutting is required and the mounting bolt threads into the box itself

A progressive valve will have a softer low-speed force that ramps up very quickly as shaft speed increases

2 EA J301GP front strut

performance

These are perfectly fine for regular driving

1-5/8" Stainless Headers. 2003-2004 Mercury Marauder 4.6L 4V 1987-pontiac-firebird-esi3246161 Very minimal cutting is requiredKooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud