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Upgrade your 2001-2007 Duramax 6.6 with this high-quality Downpipe Back Exhaust System Kit. Made of durable 409 stainless steel, this kit includes hangers, clamps, and tailpipe to provide a seamless exhaust installation experience. Custom mandrel bent exhaust system kit is designed to minimize backpressure restriction so your turbo operate at peak performance.
This listing is for a brand new system. Pictures are of exact system that will be shipped.
Note while this is a 5\" exhaust system, the downpipe connection is smaller in diameter due to fitment interference issues. Please see photos for reduction in pipe size.
Depending on cab and bed length, removing or cutting down the length of one intermediate pipe may be required for your application. Your new exhaust kit will come with instructions for assembly. Please review pictures for included components. Clamps and hangers are included. The band clamp on the downpipe connection will be reused from your existing exhaust system.
We ship our items within the continental USA ONLY. No shipping to Hawaii, Alaska, Puerto Rico, PO Boxes / APO\'s. NOTE:
Please reach out to our staff prior to purchasing if you have any questions.
1. Does NOT fit Cab & Chassis model vehicles.
2. Does NOT fit standard cab trucks - Extended and Crew Cab ONLY (unless you want to make some cut and size the pipes for standard cab (Not specified in included directions.)
3. 2007 year was a split model year. This will fit the 2001-2006 version of the 2007 model year, commonly referred to as the \"classic\" in 2007. Will NOT fit the 2007.5+ model years.
4. This exhaust is 409SS as stated! If you are looking for 304 or 316, please do not buy! Please research 409SS if you are not certain of the differences! We have had a number of sellers disappointed they did not receive a mirror finish 316SS exhaust system when they ordered the best priced 409SS system on . Please understand what you are buying. Shipping is expensive and we value our response.
5. This is an exhaust kit! It is designed to bolt on and fit without modification, but as with any kit, slight modifications may be required to fit your vehicle application. Please ensure you have the skills and tools to install this kit. We are here to help if you have issues during your install.
On Jun 24, 2026 at 12:14:03 PDT, seller added the following information: