Removing restriction from your exhaust system is the key to added performance. Increasing piping size effectively does this, but with the stock catalytic converter in place you are still loosing horsepower. Invidia eliminated this with their catless test pipe. The test pipes are 60mm and are constructed of stainless steel. These pieces will finish off your exhaust system nicely and free up every last bit of power from your motor.
This product is not California CARB approved. We cannot ship this item into CA.