A direct bolt in for the EVO 8 and 9, the COBB test pipe is a replacement for the factory catalytic converter. Our test pipe will work with the OEM exhaust as well as any exhaust that would keep the factory catalytic converter.

Made of 304 stainless steel with a 3" diameter, the test pipe is available with a high flow cat or catless.

 Sound Measurement Data:
Stock DP & Cat with Cobb cat-back - idle - 80db SAE J1169 - 88db
Cobb DP, Stock Cat, Cobb cat-back - idle - 79db SAE - 93db
Cobb DP, Cobb catless test pipe, Cobb cat-back - idle - 83db SAE - 98db
Cobb DP, Cobb high flow cat pipe, Cobb cat-back - idle 80db SAE 94db