1964-1977 Chevelle Hooker 4 Inch Sidetube Slip-In Maximum Flow Mufflers 21046HKR

This high performance muffler has been developed for vehicles with 4 inch 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 inch perforated core in a 4 inch casing. Sold in pairs.
Features:

• Fits 4 inch 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 in. to 4 in. contoured inlet/outlets
• 2-1/2 in. high flow perforated core in a 4 in. casing
• 2.5 inch Perforated Core Surrounded by High temperature Sound Absorbing Packing Material

Manufacturer Part Number : 21046HKR