MBRP 4″ PRO Series Filter-Back Exhaust System | Exhaust System | S6059304


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Product Description:

MBRP 4″ PRO Series Filter-Back Exhaust System (S6059304) enhances the sound of your 2020-2021 GM L5P Duramax.   This MBRP exhaust kit comes with everything you need for a complete bolt-on installation that removes the factory muffler.  The MBRP Pro Series is designed and built for the serious enthusiast who will settle for nothing less. Constructed from T304 stainless steel it delivers optimal durability that keeps on looking its best. Easy to clean and maintain this is the product of choice for owners of lifted vehicles, show trucks, or those who operate in severe environments.


Built To Perform:

MBRP’s performance exhaust systems are built to perform. Designed to maximize exhaust flow and minimize exhaust temperatures in your vehicle. Every system we sell has been built to the most exacting standards in the industry.


Easy Installation:

MBRP systems are as much fun to install as to drive with on your truck. Bolt-on, no weld design makes installation a no hassle one and a half to two-hour project. Everything is a direct fit to the OEM hangers, and you get all the clamps and parts you will need.


Sound & Style Performance:

The one thing but at MBRP we believe that appearance and sound are just as important. Every MBRP performance exhaust system has been specifically tuned to get the optimal sound from your pickup. With our stamped logo on the tip and our unmistakable styling, there is no question that you have the hottest performance exhaust on the road – MBRP.



  • 2020-2021 GM 6.6L Duramax L5P (All Crew & Ext. Cab)




  • 5″ Polished Tip
  • Bolt-on Installation
  • Corrosion Resistance
  • Enhanced Exhaust Tone
  • 4″ Mandrel Bent Tubing
  • Removes Factory Muffler
  • T304 Stainless Steel Construction

Additional information

Weight 14.9 lbs







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