2001-2007 Duramax 4" Cat-Back Single Side Exit Exhaust w/ Muffler (S6004409)

MBRP's 4" ARMOR Plus cat-back replaces the restrictive factory exhaust on the 2001-2007 6.6L Duramax with mandrel-bent T409 stainless steel tubing, for a deeper tone and a freer-flowing path out the back. It exits single side and finishes with a polished 5" stainless tip. A 4" front pipe is included for trucks not running a catalytic converter.

Other versions of this system:

• S6004P: Aluminized steel, with muffler, no tip
• S6004PLM: Aluminized steel, no muffler
• S6004AL: Aluminized steel, with muffler and 5" tip
• S6004SLM: T409 stainless, no muffler
• S6004304: T304 stainless, with muffler and 5" tip

Part Number: S6004409

• 4" mandrel-bent T409 stainless steel tubing
• Muffler included
• Single side exit
• Polished 5" stainless steel tip, single wall, rolled end, angle cut
• 4" front pipe included for vehicles not equipped with a catalytic converter
• Bolt-on install using factory hanger locations, clamps and hangers included

• Fits Extended Cab and Crew Cab configurations with the 6.6L Duramax engine only.
• MBRP exhausts are designed to fit all wheelbase and cab configurations unless otherwise specified.

• ARMOR Plus series, lifetime warranty

Installation Instructions

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