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

        SKU: 431108

        Introducing the 4" Aluminized Cat Back Single exhaust system, designed specifically for 2001-2004.5 GM 2500/3500 6.6L DURAMAX vehicles. Crafted from durable 16 gauge aluminized steel, this performance enhancement accessory fosters easy installation with user-friendly preweld contour bends and included clamps, maximizing your truck's horsepower and enhancing airflow. Don't miss out on transforming your ride's performance; upgrade today to experience the power you can feel and hear!

        0.0
        Mel’s Manufacturing
        Vehicle Specific
        Check if this part fits your vehicle.
        • Brand: Mel’s Manufacturing
          • 3% off
          $690.00 save $20.70
        • $669.30

        This 4" exhaust system is expertly crafted from robust 16 gauge aluminized steel or high-grade T409 Stainless, ensuring long-term durability and dependability.

        Engineered with user-friendly features like preweld contour bends and included clamps, installation becomes a seamless process, allowing you to focus on performance.

        Experience a substantial increase in horsepower, reduced EGTs, and enhanced airflow that will transform your 2001-2004.5 GM 2500/3500 6.6L DURAMAX.

        Upgrade today for power you can both feel and hear!

          • SKU
            431108
          • Weight
            69 lbs
          • Manufacturer Part #
            820
        • 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 3500 HD
        2001GMCSierra 2500
        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
        2004ChevroletSilverado 2500
        2004ChevroletSilverado 3500 HD
        2004GMCSierra 2500
        2004GMCSierra 3500 HD