Does anyone know if the Berks test pipes are a direct fit and whether or not they will cause a CEL? Thanks in advance

 

Should be a direct fit. most TPs will throw a CEL but sometimes an O2 extender will work. The Fast Intentions and the OBX have a long O2 port that works well as far as no CEL codes thrown. My OBX have about 4k miles now w/ no CEL. FWIW I would only get RESONATED test pipes.
Here's a link
https://www.myg37.com/forums/engine-...est-pipes.html

 

Agree with Blnewt, resonated or bust man. You'll hate yourself if you don't, not to mention everyone around you.