Originally Posted by M3GTC
Stage 1 and 2 are pretty similar I'm currently running stage 2 and it's awesome even though I have my cats still (reason for stage 2 car delete very soon).
But stage one is for cars still with primary cats and stage 2 is a cat delete tune
Yes my cats are still in place
I am only running an axle-back and only plan on an addition of a MS stage II intake or K&N/AA drop-in