Vibrant Performance Mufflers are constructed from T304 Stainless Steel. These units guarantee excellent durability and corrosion resistance. Lightweight and compact, this Vibrant 3.5" race muffler features a "True Straight Through" perforated core that is designed to significantly reduce noise levels without performance loss. Vibrant Performance Race Mufflers are designed to help reduce noise levels produced by high performance vehicles and feature Vibrant's unrestricted "True Straight Through" perforated internals to avoid performance loss. Tracks all over North America now require racers to install some form of sound reduction equipment on their race vehicles and Vibrant Race Mufflers are a great way to bring your vehicle into compliance. Vibrant Performance race mufflers are designed to comply with the rules and avoid performance loss! SPECIFICATIONS: Inlet Diameter 3.500" Outlet Diameter 3.500" Muffler Size 4.125" Round Body Overall Length 9.000" Material 304 Stainless