GAS High Flow Cats, Audi 3.0T Supercharged

GAS high flow cats are exactly what I wanted/needed! It has really opened the flow of my S4 with noticeable increase in engine performance, no CEL, a very nice low rumble with no resonance issues, and no excessive gas smell. GAS promised and delivered; highly recommend!

This is a fantastic set of high quality catted test pipes. Everything installed supper smooth, lined up, and with zero leaks first fire up. With a stage 2+ tune, ported blower on pump gas, I passed emissions in Utah without a problem. Thanks for making what I think is the best catalytic replacements on the market!

Unfortunately I can only give this product 5 stars, since they don't offer 6 stars! The issue I have with them is that they are far too nice to be hidden under the engine. The workmanship is absolutely incredible. Yes, they cost more than some Alibubba brands out there but definitely worth the difference in cost - and then some. Shop had zero issues with fitment, and these are hardly noticeable from a sound perspective (stock exhaust) which is exactly what I wanted. Slight deeper tone, but otherwise very stock sounding. Very happy with this purchase!