This two chamber design incorporates Flowmaster's patented Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over Original 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.Features: Durable Fully Welded 16 Gauge Aluminized Steel 3 Year Limited Warranty Mild to Moderate Exterior Exhaust Tone Minimal Interior Resonance Excellent Choice For Street Rods Cars and Trucks Improved HP/TQ and Potential Mileage Improvement Race Proven Patented Delta Flow® TechnologyApplications include: Caprice, Impala, Skylark, Buick, Chevrolet, 1996, 1995, 1994, 1977, 1976, 1975, 1972, 1971, 1970, 1969, 1968, 1967, 1966, 1965 Product Description: 40 Series Delta Flow Muffler, 2.25" IN (O) / OUT (O), Opposite Side Offsets: ea, 16 Gauge Aluminized SteelPit Stop USA offers Flowmaster 40 Series Delta Flow Muffler - 2.25" Offset - Inlet / 2.25" Opposite Side Offset Outlet 942443 at low everyday prices. Be sure to check out all our products from Flowmaster including Flowmaster 40 Series Delta Flow Mufflers.