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4" Aluminized Downpipe Back Single NO Muffler
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        4" Aluminized Downpipe Back Single NO Muffler | 2011-2015.5** GM 2500/3500 6.6L DURAMAX (FLO-PRO)

        SKU: 431017

        Transform your 2011-2015.5 GM 2500/3500 with the 4" Aluminized Downpipe Back Single NO Muffler exhaust system, expertly crafted for the 6.6L Duramax engine. Designed for high airflow and superior performance, this durable aluminized steel system not only lowers exhaust gas temperatures but also enhances engine responsiveness, making it a perfect performance upgrade for enthusiasts. Experience effortless installation with included TorcTite clamps and elevate your truck's capabilities today!

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        Mel’s Manufacturing
        Vehicle Specific
        Check if this part fits your vehicle.
        • Brand: Mel’s Manufacturing
          • 3% off
          $880.00 save $26.40
        • $853.60

        This 4-inch Downpipe Back Single NO Muffler system is expertly crafted from durable aluminized steel, designed specifically for 2011-2015.5 GM 2500/3500 trucks with a 6.6L Duramax engine. Engineered to enhance airflow, it helps maintain lower exhaust gas temperatures (EGTs), resulting in superior engine performance. With contour bends and dependable TorcTite clamps included, installation is simplified and efficient.

        Feel the difference with Mel's Manufacturing, where each exhaust note translates to increased horsepower and enhanced vehicle responsiveness. Ideal for competitive environments or performance enthusiasts, this exhaust system adheres to stringent manufacturing protocols.

        Upgrade your truck's exhaust functionality and experience the benefits of Mel's exceptional engineering solutions today!

          • SKU
            431017
          • Weight
            76 lbs
          • Manufacturer Part #
            864NM
        • 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
        2011GMCSierra 2500 HD
        2011GMCSierra 3500 HD
        2011ChevroletSilverado 2500 HD
        2011ChevroletSilverado 3500 HD
        2012GMCSierra 3500 HD
        2012GMCSierra 2500 HD
        2012ChevroletSilverado 2500 HD
        2012ChevroletSilverado 3500 HD
        2013ChevroletSilverado 2500 HD
        2013ChevroletSilverado 3500 HD
        2013GMCSierra 2500 HD
        2013GMCSierra 3500 HD
        2014GMCSierra 2500 HD
        2014GMCSierra 3500 HD
        2014ChevroletSilverado 2500 HD
        2014ChevroletSilverado 3500 HD
        2015GMCSierra 2500 HD
        2015GMCSierra 3500 HD
        2015ChevroletSilverado 2500 HD
        2015ChevroletSilverado 3500 HD