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4" Stainless  Cat Back Single With Muffler
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        4" Stainless Cat Back Single | 2001-2004.5 GM 2500/3500 6.6L DURAMAX With Muffler (FLO-PRO)

        SKU: 432119

        Upgrade your ride with the 4" Stainless Cat Back Single exhaust system, engineered for 2001-2004.5 GM 2500/3500 Duramax models, ensuring a perfect fit and enhanced airflow. This high-performance exhaust system, crafted from either 16 gauge aluminized steel or T409 stainless steel, offers easy installation with included clamps and optimized flanges while maintaining emissions compliance. Experience improved engine performance and reduced exhaust gas temperatures—don’t miss out on this unbeatable upgrade; elevate your Duramax today!

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        Mel’s Manufacturing
        Vehicle Specific
        Check if this part fits your vehicle.
        • Brand: Mel’s Manufacturing
          • 3% off
          $860.00 save $25.80
        • $834.20

        Engineered with precision from either 16 gauge aluminized steel or T409 stainless steel, this high-performance cat-back exhaust system ensures effortless installation thanks to included clamps, pre-weld contour bends, and optimized flanges.

        Experience a significant enhancement in engine performance, reduced exhaust gas temperatures (EGTs), and superior airflow with the Mel's system that performs as impressively as it sounds.

        Designed specifically for 2001-2004.5 GM 2500/3500 Duramax models, this exhaust solution retains the catalytic converter for emissions compliance while featuring contour bent hangers and TorcTite clamps—a true powerhouse upgrade!

          • SKU
            432119
          • Weight
            65 lbs
          • Manufacturer Part #
            SS820
        • Material
          Aluminized, Stainless
        • Muffler
          With 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
        2001GMCSierra 2500
        2001GMCSierra 3500 HD
        2001ChevroletSilverado 2500
        2001ChevroletSilverado 3500 HD
        2002GMCSierra 2500
        2002GMCSierra 3500 HD
        2002ChevroletSilverado 2500
        2002ChevroletSilverado 3500 HD
        2003GMCSierra 2500
        2003GMCSierra 3500 HD
        2003ChevroletSilverado 2500
        2003ChevroletSilverado 3500 HD
        2004GMCSierra 2500
        2004GMCSierra 3500 HD
        2004ChevroletSilverado 2500
        2004ChevroletSilverado 3500 HD