Don't be fooled by the classic, subtle style of the STREETPOWER range of Universal Performance Mufflers. Their "True Straight Through" internals ensures unrestricted exhaust flow for maximum power but they also feature dense, multi-layer sound suppression materials inside each of these mufflers to help control exhaust tone and drone. All StreetPower Universal Mufflers feature PREMIUM 304 Stainless Steel construction, polished to a beautiful mirror finish.