Not forgetting Chrysler 300C 5.7L Hemi enthusiasts, Billy Boat Performance Exhaust developed this high-performance cat back system out of 3" CNC mandrel bent tubing for increased flow and performance. Incorporating the latest in resonance control technology, B&B’s proprietary Purge Resonance Technology or PRT as it is known, this system enables you to have a mild exhaust note at cruising speeds yet a forceful note on aggressive driving. This low restriction system allows for quicker throttle response as well as increased horsepower and torque which have been confirmed by the chassis dyno and by our customers. With sound and performance achieved B&B didn’t forget about appearance and hand builds each system entirely out of T-304 stainless steel and is TIG welded for unmatched beauty and craftsmanship. For aesthetics B&B uses a pair of 4” round double wall tips for a bold, distinctive look. No engine management sensors are moved or altered therefore this system is 50 state emissions legal and is backed with their limited LIFETIME warranty.