3" x 2-1/2" SS GREEN Catted X-Pipe. 1997-2004 Corvette. Connects to OEM Exhaust. 2020-chevrolet-camaro-esi6216722 A progressive valve will have

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

Aluminum alloy main plate and steel alloy bearing holder construction - Tough as a tank

While some options will be digressive at lower speeds

TRUE 100% BOLT IN INSTALLATION - NO DRILLING REQUIRED

* Aluminum

3" x 2-1/2" SS GREEN Catted X-Pipe. 1997-2004 Corvette. Connects to OEM Exhaust. 2020-chevrolet-camaro-esi6216722 A progressive valve will haveKooks 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