Kooks: 2014-2019 Chevrolet Corvette LT1/LT4/LT5 6.2L -- Header and Green Catted Connection Kit-3" x 3" x 2-3/4" X-Pipe 67mm 2014-2018 Chevrolet Silverado 1500 Crew

2014-2018 Chevrolet Silverado 1500 Crew Cab/Short Bed 5

One is similar to OEM sizing and the other is larger for you guys looking for more down force paired with our ZR1 ZTK style ZTX or larger ZTXL splitter

which reduces bushing deflection

Silver spark plug electrodes transfer electricity & heat better than any other spark plug material resulting in the most powerful spark

Kooks: 2014-2019 Chevrolet Corvette LT1/LT4/LT5 6.2L -- Header and Green Catted Connection Kit-3" x 3" x 2-3/4" X-Pipe 67mm 2014-2018 Chevrolet Silverado 1500 Crew1 7 8" Header and GREEN Connection Kit. 2014 2019 Corvette LT1 LT4 LT5 6. 2L Kooks 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