Max Flow™ Sidepipe Muffler

Maximum Flow 4 in. Sidetube Slip-In Muffler; These high performance mufflers produce an average of 23% more power than open headers. Sold in pairs.; This high performance muffler has been developed for vehicles with 4 in. sidepipes such as 1965-74 Corvettes or vehicles equipped with Hooker Super Competition Roadster and Side Mount Headers. These mufflers produce an average of 23% more power than open headers and feature a high-flow, perforated core that operates at 99% efficiency. High temperature packing material absorbs noise while producing a powerful mellow sound. These mufflers, as tested on a 1968 Corvette with a 427 cu inch engine increased horsepower by 40 at a peak of 5500 RPM and 20 ft.-lbs. at peak of 4500RPM versus a leading aftermarket undercar header/turbo-style muffler combination. The outer case is constructed of durable 16 gauge aluminized steel protected by electrostatically applied high-temperature black paint. The inlet/outlet is a 2.5 perforated core in a 4 in. casing. Sold in pairs.;

Fits 4" Side Tube systems Maximum Flow Muffler Design Easily Removed For Racing Durable 16 Gauge Outer aluminized Steel Case Electrostatically applied High-Temp Black Paint Finish 2-1/2" to 4" contoured inlet/outlets 2-1/2" high flow perforated core in a 4†casing 2.5" Perforated Core Surrounded by High temperature Sound Absorbing Packing Material