Vader GT

I have the pypes muffler deletes on the 08 with stock cats & they sound great! However, just like many others, there were fitment issues that I could not solve on my own.

I did install them, but had to get one of the hangers "heated" an an exhaust shop to make sure it lined up properly.

mamba marine

Check engine light came on once I installed pypes x-pipe and flowmasters any ideals whats going on

gman73

Is the x pipe catted or o/r (non-catted). If it's an O/R then you need to have a tuner turn off the rear 02 sensor. If it's catted, often you will still get a check engine light. I had the same problem with mine from time to time. I installed 02 raisers from Brenspeed and that took care of the problem.