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4" Stainless Downpipe Back Single NO Muffler
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        4" Stainless Downpipe Back Single NO Muffler | 2017-2019 GM 2500/3500 6.6L DURAMAX L5P (FLO-PRO)

        SKU: 432022

        Unleash your vehicle's true potential with our 4" Stainless Downpipe Back Single NO Muffler exhaust system, designed specifically for the 2017-2019 GM 2500/3500 6.6L Duramax L5P. This high-flow design not only optimizes exhaust efficiency but also enhances horsepower while effectively reducing EGTs, making it a must-have for serious racers. Experience seamless installation with preweld contour bends and included clamps—elevate your performance today with Mel's Manufacturing!

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        Mel’s Manufacturing
        Vehicle Specific
        Check if this part fits your vehicle.
        • Brand: Mel’s Manufacturing
          • 3% off
          $1120.00 save $33.60
        • $1086.40

        Experience the unmatched performance of our 4" Stainless Downpipe Back Single NO Muffler exhaust system, engineered specifically for the 2017-2019 GM 2500/3500 6.6L DURAMAX L5P. Crafted from premium 16 gauge aluminized steel or T409 stainless, this system enhances airflow and optimizes exhaust efficiency.

        Installation is a breeze thanks to preweld contour bends and included clamps, ensuring a precise fit. With Mel's Manufacturing, expect a significant improvement in horsepower and reduced EGTs, delivering the power and performance that serious racers demand.

        Note: This kit is intended for non-registered race vehicles and may not comply with emissions laws when installed on street vehicles. Elevate your performance today with Mel's exhaust system!

          • SKU
            432022
          • Weight
            63 lbs
          • Manufacturer Part #
            SS880NM
        • Material
          Aluminized, Stainless
        • Muffler
          With Muffler, Without Muffler
        • Brand
          Mel’s Manufacturing
        • Manufacturer
          Mel's Manufacturing
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        Shipping Times

        Most customers will see their parts within 3-5 business days. We will primarily ship with Purolator ground & DHL Express to ensure the fastest shipping possible.

        Please Note: These are only estimates and shipping time may vary depending on your location, out of country and rural locations expect longer wait times.

        Where Do We Ship 

        We will ship our products within Canada and the United States.

        Please Note: There are limitations what can be shipped to the United States.

        Damaged Shipments

        We provide the option to purchase insurance as we are not responsible for any damage while with a courier, we don’t often see issues, but it does happen. If you purchased insurance we will put in a claim, if no insurance was purchased there will be no refunds or exchanges.

        We accept the following payment methods:


        Return Policy

        It happens sometimes we would like to return it. Here are our return rules:

        • Prior to any return you must contact us and get an approval for a  RMA number
        • Product must be unopened and have no damage. 
        • You must pay for the shipping back, please insure so if anything happens you can make a claim, we are not responsible for damage during shipping and is the sole responsibility of the customer.
        • Regular products are subject to a 5% Restocking fee.
        • Items over 50 lbs. or special orders will be subject to a 20% Restocking fee.
        • Electronics & Tuning is a final sale and cannot be returned. 
        • Fitment Type
          Vehicle Specific
        YearMakeModelNotes
        2017GMCSierra 2500 HD
        2017GMCSierra 3500 HD
        2017ChevroletSilverado 2500 HD
        2017ChevroletSilverado 3500 HD
        2018ChevroletSilverado 2500 HD
        2018ChevroletSilverado 3500 HD
        2018GMCSierra 2500 HD
        2018GMCSierra 3500 HD
        2019ChevroletSilverado 2500 HD
        2019ChevroletSilverado 3500 HD
        2019GMCSierra 2500 HD
        2019GMCSierra 3500 HD