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Flowmaster's American Thunder cat-back exhaust system part # 817664 for the 2009-2013 Toyota Tundra pickup trucks with the 5.7L or 4.6L V8 engines is perfect for the person looking for an aggressive sound level with all of the performance benefits that you would expect from Flowmaster and Marken Performance. This DOR/DOS (Dual Out Rear, Dual Out Side) bolt on 409S stainless steel system features the series 40 muffler, 2.5” stainless tubing and 3.5” polished stainless steel tips. This system is designed to fit regular cab/long bed, double cab/short bed and CrewMax models with 145 wheelbase. The exhaust system is manufactured in the USA and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.
Flowmaster’s downpipes Part # 81073 for the 1965-1968 Pontiac A-Body vehicles with 389/400 V8 engines are perfect for the auto enthusiast looking to keep a stock look in the engine compartment with the original cast manifolds. Over time downpipes can suffer from corrosion, dents, and cracks that may harm your exhaust system. Unlike press bent pipes, our mandrel bent pipes will improve performance as there is no restriction in the bends. The manifold downpipes can be adjusted and welded to the factory exhaust. 
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