Magnaflow 18980 4" Downpipe-Back Exhaust | 01-04 GM 6.6L Duramax

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Magnaflow 18980 4" Downpipe-Back Exhaust | 01-04 GM 6.6L Duramax


Warning: This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, visit

Magnaflow Aluminized Custom Builder exhaust kits have all of the basic building blocks needed to help you build the system that suits your truck; including all the necessary hangers, flanges, straight-through, and mandrel-bent pipes. The Aluminized Custom Builder Series offers the most options for customization. For the racer, they provide a mandrel-bent, pipe-only exhaust from turbo or downpipe to the tailpipe. For the street driver, Custom Builder kits are the basis for a custom exhaust that allows you to purchase and install the converter, muffler, and tip(s) of your choice. While some cutting might be needed, Custom Builder kits allow you to put together a custom exhaust without the need for welding or bending any pipes; giving you a fully customized system, with a professional finish plus great sound and performance at a reasonable cost.

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