2020-2025 Duramax 4" Downpipe Back Exhaust - No Muffler (431028 / 432028)
2020-2025 Duramax 4" Downpipe Back Exhaust - No Muffler (431028 / 432028)
The 431028 / 432028 is a 4" Downpipe Back Exhaust System by Mel's Manufacturing for the 2020-2023 L5P Duramax. It's the perfect kit if you're looking to remove your stock components and replace them with high-performance & high-flow 4" piping from your downpipe back! Just like all of Mel's Manufacturings Exhaust kits, it will come with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you cruise through the installation process. You'll notice fuel mileage improvement, increased torque, and you'll have a much better sounding 6.6L!
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