1-7/8" Header and GREEN Connection Kit. 1999-2004 Mustang Cobra 4.6L 4V. NA Miata No more jam nuts

No more jam nuts

massive spherical bearing

This combination provides superior strength

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

5° negative beyond stock (OEM spring size limits inboard travel slightly compared to the generally smaller sized coilover springs)

1-7/8" Header and GREEN Connection Kit. 1999-2004 Mustang Cobra 4.6L 4V. NA Miata No more jam nutsKooks 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