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Large Bore-HD 4" 409 Stainless Steel Cat-Back Exhaust System | #services

Large Bore-HD 4" 409 Stainless Steel Cat-Back Exhaust System

Large Bore-HD 4" 409 Stainless Steel Cat-Back Exhaust System

You also need to be careful 2004 duramax egr delete kit when tightening the bolts on the cat back. Over-tightening can damage the system, ford 6.7 egr delete so just 2011 ford 6.