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Flowmaster 40 Series Delta Flow Offset/Offset Oval Muffler; 2.50-Inch (Universal Fitment)

Item S503462
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Market Price $127.63 You Save 12% ($14.68)
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$112.95 (each)

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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Specs & Installation


      • Aggressive-Sounding Muffler with Mild Noise In-Cab
      • For Street, Strip, and Offroad Use
      • More Torque and Horsepower
      • Save Money with More Efficient Engine
      • 16-Gauge 409S Stainless Steel
      • MIG Welded for Durability
      • No Internal Packing
      • Color: Black
      • 2.5 in. Offset In; 2.5 in. Offset Out
      • Lifetime Limited Warranty
      • Simple to Install
      • Universal Fitment; Modifications Will Be Required


      On- or Off-road. Whether your Sierra goes on or off the pavement, it'll turn heads with a Flowmaster 40 Series Delta Flow 2.5 in. Offset/Offset Oval Muffler upgrade. Gain a deep, throaty sound, in addition to more power and performance potential. Featuring race-proven patented Delta Flow technology, this muffler with a 2.5 in. offset in and 2.5 in. offset out stands to improve torque and horsepower levels, not to mention boosting engine efficiency.

      Aggressive Exhaust Note. This Flowmaster 40 Series Exhaust Muffler delivers a more aggressive exterior sound that matches your truck's rugged appearance. All while interior sound is kept to a minimum, thanks to the special Delta deflectors. Rest assured that the sound won't get louder over time either, as there's no internal packing to blowout.

      409S Stainless Steel. Flowmaster proudly crafts this Black Oval Muffler in the USA from strong 16-gauge 409S stainless steel and fully MIG welds it to increase durability. The Delta Flow technology keeps interior resonance to a minimum and elevates performance, whether you're on the strip, street, or off-road.

      Modifications Required. This Muffler was designed to be used on mutliple applications, as it is not a direct fit replacement part. In order to install this Muffler properly on your vehicle, some modifications to the exhaust system will be required.

      Application. Flowmaster makes this 2.5 in. Offset In / 2.5 in. Offset Out Oval Muffler to fit 2007-2020 GMC Sierra 1500s.

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      Fitment: 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

      Flowmaster 842543

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Muffler

      Customer Reviews (1)

        Reviews of Flowmaster Exhaust products have an average rating of 4.6 out of 5

          Questions & Answers

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