[427supr]

Eric at Performance Engineering just did mine. I went to the stainless 3" exhaust. Eric said on the dyno it showed a 25-30hp gain. I don't know for sure how much you will feel it at the seat of your pants, but the car sure does sound better! It cost $1200 bucks out the door with the ceramic coating. I know the car is at least breathing better now. Performance Engineering is located in Ross, Ohio near Cincinnati.