Feature the revolutionary Power Chamber™ design; a unique cross-over system that increases horsepower and torque. Full-coverage 2 1/2” heat shields that are essentially blue-proof for long-lasting style. Like all Vance & Hines systems these feature a superior fit and an unrivaled finish when compared to other systems. Meticulously finished billet end caps. Removable baffles and all mounting hardware included. Systems include mounts for factory oxygen sensors as required. Made in the U.S.A. We recommend using a dynojet power commander on all fuel injected models. There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Discoloration is caused by tuning characteristics cam timing carburetor jetting overheating etc. and is not caused by defective manufacturing.