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Banks Monster 4" Down-Pipe Back Single Exit Exhaust, Chevy/GMC (2001-04) 6.6L Duramax CC/EC LB, Aluminized off road

With nearly five decades of engineering airflow improvements, Banks has mastered the art of maximizing flow while minimizing backpressure. The polished straight-through Monster Muffler, mandrel-bent head pipe assembly (non-cat-converter-equipped vehicles only), intermediate pipe(s) and tailpipe nearly triple the exhaust flow, cut backpressure up to 98%, lower exhaust gas temps and deliver more power to the ground. And the 5” polished rolled-edge tip has a double-walled design with a ½” air gap to keep heat from tarnishing the mirror finish.

Many straight-through mufflers deliver an obnoxious drone that overpowers conversations. Banks Monster Muffler is extensively sound-tested and engineered with a unique expansion chamber and high-temperature packing. Instead of a drone, you’re treated to a rich exhaust note that’s authoritative, yet civil. It sounds as great as it looks!

This of road kit doesn't retain the cat converter.
Was: $719.86
Sale: $647.87
Save: 10%
Save: $71.99

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Why consider a cheap, ill-fitting aluminized exhaust? Banks 4” Monster Exhaust is made of rugged, long-lasting 100% stainless steel. It fits better than the competition, because Monster Exhaust utilizes the factory hangers and maintains proper clearance to all under-vehicle components.


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  • Item Requires Shipping
  • 107.0 lbs.
  • W35.0000” x H10.0000” x L37.5000”
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