2001-2007 GM Chevrolet Duramax 6.6L Turbo Back Exhaust. Great Deal for the Money! 4" Aluminized Steel tubing. Includes everything necessary from the turbo back including all new hangers. Downpipe is 4" and then it runs 4" all the way to the tail. Includes 4" Straight through design Aluminized muffler. This system deletes the catalytic converter. Tip Not Included! Fits all cab and bed sizes.

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