Free Shipping On Orders Over $75. Details

Talk to a Sierra Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win a $4,000 Build! Enter Now >

AFE MACH Force XP 3-Inch Dual Exhaust System with Polished Tips; Side Exit (14-18 5.3L Sierra 1500)

Item S501146
Call a Sierra Enthusiast at 1-888-706-1096
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $1,039.83 You Save 13% ($135.63)
Our Price

$904.20 (kit)

FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    or use

      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 5.3L GMC Sierras
      • Designed to fit Regular Cab Models Only


      High-Flow Action. The aFe Mach Force XP 3-inch Split Side Exit Cat-Back Exhaust with Polished Tips is a liberating solution to the problem of how to let your 2014-2018 5.3L Sierra's engine achieve its unrealized, latent capabilities. Eliminating the restrictions of the factory exhaust, the Mach Force XP sends exhaust streaming out 29% faster, letting more cold air flow into the engine for a hefty boost of +14 hp and +17 ft/lbs of torque (dyno proven). The free flow is tuned to create a strong, vigorous exhaust noise, and the system ends in a pair of 4.5" tips polished to a mirror brilliance and finished off with high quality black laser-cut aFe badges for a competitive, combative feel.

      Stainless Steel Build. aFe's engineers use stainless steel for the entire structure of the Mach Force XP Cat-Back Exhaust, with most of it made from T-409 stainless and the tip from aerospace grade T-304 (with a black-coated laser-cut stainless badge riveted on). USA-made, both the intermediate pipes and tailpipes are 3" in diameter and mandrel bent. This system comes with band clamps, bayonet hangers, and hardware, and can be bolted on easily to the factory mounting points without welding or drilling.

      Application. This version of the aFe Mach Force XP 3-inch Split Side Exit Cat-Back Exhaust with Polished Tips is designed to fit the 2014-2018 5.3L GMC Sierra's with the following cab and box configurations.
      • Regular Cab with the Standard Box
      • Regular Cab with the Short Box

      Shop All Truck Parts And Accessories

      Shop All Truck Exhaust



      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 (69)

        Questions & Answers

        10 More Questions

        Will It Fit My Sierra 1500

        • 5.3L V8 - 14, 15, 16, 17, 18

        Designed to fit Regular Cab Models Only.

            Related Sierra 1500 Categories