Performance minded Subaru owners can now choose from a selection of single or dual-tip PERRIN Performance™ Cat-Back Exhaust Systems. Each system promises maximum exhaust flow, increased horsepower and a smooth tone. All mate perfectly with factory hangers, undercarriage and bumper. Each features 3” stainless steel plumbing and fully flanged joints to ease installation. Both straight through (Sport-Tone™) and baffled (Street-Tone™) choices are available. See the application chart for specific options on your car. Dual-Tube™ For WRX and STi owners a specialty system is now available, using dual 2.25” exhaust pipes to carry exhaust gasses and unwanted sound to the rear of the vehicle, and exiting through a 4” slash-cut tip. This system is designed for clients with far higher horsepower than stock.