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AFE MACH Force XP 3-Inch Dual Exhaust System with Polished Tips; Side Exit (14-18 4.3L Sierra 1500)

Item S501143
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$822.00 (kit)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Cat-Back Exhaust
      • T-409 Stainless Steel Tubing and Muffler
      • 3 in. Mandrel-Bent Tubing
      • Polished 4.5 in. Stainless Steel Exhaust Tips
      • Exits Behind Each Rear Tire
      • 2-Year Warranty
      • Fits 2014-2018 4.3L GMC Sierras
      • Designed to fit Regular Cab Models Only


      Improved Exhaust. Bolting an aFe Mach Force XP 3-inch Split Side Exit Cat-Back Exhaust with Polished Tips onto your 2014-2018 4.3L GMC Sierra is the same as bolting on +14 more horsepower and +17 ft/lbs of torque, gains proven by thorough aFe dyno tests. This exhaust system deploys mandrel-bent tubing and a high-flow muffler to generate both big power gains and a throaty, aggressive, boisterous exhaust note that will get your pickup noticed anywhere. Boosting exhaust removal by 29% and cooling the fumes by 100° F, the Mach Force eases backpressure so the engine breathes easier and throttle response improves - while looking great with its 4.5" polished tips badged with the aFe logo in black.

      Durable Construction. T-409 stainless steel is the material used for the aFe Mach Force Cat-Back's construction, including the 3" mandrel-bent pipes and the straight-through muffler. The tip is 4.5" T-304 stainless steel, a higher grade (aerospace quality) which is immune to discoloration over time. The part is designed for bolt-on installation, and comes with leak-preventing premium band clamps (creating a 360° seal), hardware, and bayonet tip hangers to provide steady mounting. It is warranted for 2 years and USA-made.

      Application. The aFe Mach Force XP 3-inch Split Side Exit Cat-Back Exhaust with Polished Tips is designed for use on 2014-2018 4.3L GMC Sierras with the following cab and box configurations.
      • Regular Cab with the Standard Box
      • Regular Cab with the Short Box

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      AFE 49-44071-P

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Cat-Back Exhaust System
      • Hardware

      Tech Specs


      Customer Reviews (68)

        Questions & Answers

        10 More Questions

        Will It Fit My Sierra 1500

        • 4.3L V6 - 14, 15, 16, 17, 18

        Designed to fit Regular Cab Models Only.

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