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!

Got my high flow cats after ordering from another place which gave me a check engine light as soon as I drove off got garage auto sports high flow cats and no check engine came on could tell the difference from stock and those fake wanna be cats from german car accessories I'll be ordering more parts from garage or even taking my car straight to them

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!