RACE-INSPIRED PERFORMANCE DESIGN: Flowmaster’s loudest, most aggressive chambered muffler, built for extreme tone and raw street presence. Ideal for muscle cars, LS swaps, lifted trucks, drag cars, retro-mods, and off-road builds. Built for hardcore enthusiasts who want to be heard before they’re seen. This muffler makes no apologies for being loud. LEGENDARY DELTA FLOW TECHNOLOGY: Patented internal chambered muffler design increases exhaust velocity and reduces back pressure for maximum power and performance. PROVEN PERFORMANCE: Enhances exhaust flow to boost horsepower, torque and increased throttle response. BUILT TO LAST: Constructed from premium 409 stainless steel for ultimate durability and fully MIG-welded to withstand extreme heat, vibration, and tough driving conditions. UNIVERSAL FITMENT: Designed with a short case length to accommodate a wide range of custom builds and modified exhaust setups, available in multiple inlet/outlet sizes and configurations.