We decided to make our own exhaust X-pipe to replace where the CATs go for when racing.

To me the X pipe should be close to where the bends are that trap gases and not further back where pipes are straight.

We also made slip flanges for the CATS so they can be easy swapped with X-Pipe when need be

We'll post more scanner data of test results to see what differences there are.

Three inch slip fittings for Collectors or Headers and 2 1/2 fittings to stock mid exhaust pipe.

Gut feeling is the exhaust pulses are better, exhaust sounds smoother, more low end torque and requires a PCM tune as O2s report leaner with the X pipe installed but further analyzing the scanner data should give the results


Attached Files G-CATS.jpgXpipe.jpgX-pipe.jpgX-pipe2.jpgX-CATS.jpg

Team ZR-1
True Custom Performance Tuning
Teamzr1.com