I added a stage 3 in collaboration with the one muffler 3" full exhaust, Magnaflow Sport Cat, GS open air intake and new silicone vacuum hoses.
My 99 9-5 is a beast! Better acceleration, more horsepower and a mean sound to go with it. I loved this car before, but with the stage 3 addition, it's a whole new car!
Rating: [5 of 5 Stars!]