817940 This Flowmaster American Thunder dual exhaust system is specifically designed for 1967-1972 Chevrolet and GMC K10, K15/K1500, K20, and K25/K2500 4wd trucks with V8 engines. The system is perfect for the person looking for an aggressive to moderate interior and exterior sound level. Starting at the crossmember-back, the exhaust comes complete with a built-in H-pipe crossover for better exhaust scavenging, all mandrel-bent 2.50-inch stainless steel tubing, a pair of Super 44 Series performance mufflers, and your choice of three tailpipe exits (Turndown behind rear tires, side exit behind rear tires, or straight out the back under the bumper). The system includes all hardware necessary for installation and is covered by our Lifetime Limited Warranty. Fits both short and long wheelbase trucks. Features: Crossmember-Back Design Works with Stock Manifolds or Headers, Allowing More Application Options 16-Gauge, 2.50-Inch 409 Stainless Steel Pipes add Durability and Strength Super 44 Mufflers Deliver Increased Performance and an Aggressive to Moderate Sound Level Three Different Tailpipe Exit Options Allow You to Tailor the Look of the Kit to Your Style Mandrel-Bent Pipes Help to Maximize the Exhaust Flow for Better Performance H-Pipe Style Crossover Helps Exhaust Gas Scavenging and Reduces Drone Includes Hangers and Hardware for Installation Lifetime Limited Warranty About Flowmaster Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound. SPECS Brand Flowmaster Emission Code 5 Exhaust Series American Thunder Exit Position DOR/S Heat Shield No Material 409 Stainless Steel Mount Type Uses New Hangers (Included) Muffler Body Length (in) 13.5 Muffler Color Black Muffler Finish Painted Muffler Inlet Diameter (in) 2.5 Muffler Inlet Location Offset Muffler Material 409S Stainless Steel Muffler Outlet Diameter (in) 2.5 Muffler Overall Length (in) 19.5 Muffler Part Number Kit Only Muffler Quantity 2 Muffler Series Super 44 Muffler Shape Oval Muffler Type Reflection Product Type Exhaust System Single Dual Dual Sound Level Aggressive / Moderate System Type Crossmember-back Tip Style Not Included Tubing Diameter (in) 2.5 Tubing Material 409S Stainless Steel UPC 090127117200 California Proposition 65 Chemical Name Chromium (hexavalent compounds) Nickel (Metallic) California Proposition 65 Required Yes Part Number 817940 EMISSIONS 5 This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations. TECH RESOURCES Instructions for part # 817940 Warranty for Part# 817940 Manifold down pipes and header reducers not included. Fits both long and short bed trucks.
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