Installing Momentum Headers

Originally Posted by AlexRaymond19

That is actually the stock cat numbers. They said it made more HP with the stock cats by 2whp... I don't really know how that is possible... First impressions, it felt slow. I don;t know if its because its a **** ton quieter and just feels slower or what. I put the TP map on, and it friggin screams now. Its like stupid fast. Is it okay to run the TP tune with the cats on?

Also, i am most definately taking it to another shop to verify dyno results and see if they can take a peak at the tune and see what the deal is with the test pipes not making more power.