Kooks 3in x OEM Stainless Green Catted Connection Pipes Jeep Grand Cherokee | Dodge Durango 5.7L 2011-2026

3" x OEM Stainless Steel Ultra High Performance Green Catted (with Green Cats) Connection Pipe. Kooks specializes in high performance exhaust systems for domestic cars and trucks. Kooks manufactures exhaust systems ranging from Custom built headers for Race Applications to bolt on systems for production cars.drivers are always looking for ways to extract more power and improve the driving experience. An aftermarket exhaust achieves both of these objectives. The increased flow improves funct