Tried and proven this Billy Boat Performance Exhaust cat back exhaust for the C4 Corvette LT-4 has been the industry leader for over a decade. With unparalleled performance, sound and style this system was developed with the true enthusiast in mind. Designed on their in house chassis dyno this precision crafted system just says performance. 3” CNC mandrel bent tubing is used throughout the entire system provides a smooth, balanced, unrestricted exhaust flow providing increases of as much as 12 horsepower and 16 foot pounds of torque. These results have been confirmed by the chassis dyno and by our customers. With a combination of sound absorption and cancellation this complex yet simple design emits a deep, robust, bark on hard acceleration, aggressive driving with a mild tone at cruise. Hand fabricated using 100% T-304 stainless steel, this exhaust system is manufactured as a direct bolt-on replacement for the factory system and by utilizing the factory mounting locations this system requires absolutely no cutting, welding, or modifications for installation and includes all mounting hardware. A pair of 4.5” oval tips on each side gives the Vette a bold and individual look. With unparalleled quality and attention to detail this 50 state emissions legal system is backed with B&B's limited LIFETIME warranty.