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4" Aluminized Downpipe Back Single With Muffler
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        4" Aluminized Downpipe Back Single With Muffler | 2011-2015.5** GM 2500/3500 6.6L DURAMAX (FLO-PRO)

        SKU: 431016

        Unlock the true potential of your truck with the high-performance exhaust system specifically designed for 2011-2015.5 GM Duramax 6.6L models. Crafted with durable aluminized steel construction, this system promises simple installation and significantly improved airflow, enhancing your vehicle's performance with a noticeable horsepower boost. Don’t settle for less—transform your driving experience with Mel's Manufacturing exhaust system today!

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        Mel’s Manufacturing
        Vehicle Specific
        Check if this part fits your vehicle.
        • Brand: Mel’s Manufacturing
          • 3% off
          $920.00 save $27.60
        • $892.40

        Experience unparalleled performance and efficiency with this high-performance exhaust system crafted from 16 gauge aluminized steel or durable T409 Stainless. Designed by Mel's Manufacturing, it ensures intuitive installation through preweld contour bends and included TorcTite clamps, reducing your setup time.

        This exhaust system not only amplifies airflow but also significantly lowers exhaust gas temperatures (EGTs), providing a noticeable horsepower boost that you can hear. It's tailored for compatible 2011-2015.5 GM Duramax 6.6L models, ensuring maximum compatibility and performance.

        Transform your vehicle's capacity for power—choose Mel's exhaust system today and feel the difference in every drive. Note that this system is intended for non-registered race vehicles and may not comply with emission regulations.

          • SKU
            431016
          • Weight
            69 lbs
          • Manufacturer Part #
            864
        • 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 2500 HD
        2012GMCSierra 3500 HD
        2012ChevroletSilverado 2500 HD
        2012ChevroletSilverado 3500 HD
        2013GMCSierra 2500 HD
        2013GMCSierra 3500 HD
        2013ChevroletSilverado 2500 HD
        2013ChevroletSilverado 3500 HD
        2014GMCSierra 2500 HD
        2014GMCSierra 3500 HD
        2014ChevroletSilverado 2500 HD
        2014ChevroletSilverado 3500 HD
        2015ChevroletSilverado 2500 HD
        2015ChevroletSilverado 3500 HD
        2015GMCSierra 2500 HD
        2015GMCSierra 3500 HD