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MBRP 3 in. XP Series Dual Exhaust System - Rear Exit (14-18 4.3L Sierra 1500)

Market Price $701.99 You Save 12% ($82.00)
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$619.99 (each)

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  • Item S501126

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    Features & Details

    • XP Series Exhaust System
    • 3" 409 Stainless Steel Mandrel Bent Tubing
    • Mirror Polished T-304 Stainless Steel Exhaust Tips
    • 16-Gauge Tubing Walls
    • Split Rear Exit
    • High Flow Muffler
    • Deep, Mellow Exhaust Note
    • Hardware Included
    • Limited Lifetime Warranty
    • Fits 2014-2018 4.3L GMC Sierras
    Long-Lasting, Rugged. Directing the exhaust out two split rear exits facing to the rear, each tipped by a glistening 4.5" stainless exhaust tip, the MBRP XP Series 3-inch Split Rear Exit Cat-Back Exhaust is a system for your 2014-2018 Sierra that's made from intermediate grade stainless. Rumbling authoritatively with a strong yet tuneful sound, the exhaust also looks good thanks to its brash styling, with two large exhaust tip visible below the rear bumper. Dyno tests indicate this cat-back can yield up to +5-10% extra hp and torque for your truck – engine efficiency that's underlined further by the +1-2 mpg gas economy gains you'll enjoy with this system installed.

    T-409 Stainless Design. MBRP's engineers use T-409 stainless for all parts of this cat-back system, with the exception of the T-304 stainless steel tips. Cheaper than T-304 and therefore giving you more bang for your buck, T-409 nevertheless stands up stubbornly to rust and corrosion, giving you a limited lifetime warranty on this system.

    Easy Installation. The installation process of MBRP Cat-Back Exhaust is easy and the exhaust system can be installed with common hand tools. The bolt-on, no weld design provides you with a hassle-free installation process that can be completed in approximately 1-2 hours. Depending on your cab and box size, some cutting to the piping may be required.

    Application. The MBRP XP Series 3-inch Split Rear Exit Cat-Back Exhaust is designed to fit with all of the cab and box configurations available for the 2014-2018 GMC Sierra's with the 4.3L engine.

    Fitment: 2014 2015 2016 2017 2018 Details

    MPN# S5084409

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Muffler
    • (1) Extension Pipe
    • (2) Over Axle Pipes
    • (2) Tips
    • Installation Hardware
    Installation Info
    Tech Specs
    Will it fit my Sierra 1500?

      Customer Photos

        Questions & Answers (5)

        5 Top Rated Questions

        Will this fit the 2018 LT z71 package? I was reading an article that said it wouldn't fit and wanted to check before purchase.

        • The MBRP 3 in. XP Series Dual Exhaust System will work on any 2018 Silverado 1500 with the 5.3L V8.

        Helpful (1)

        How much drone will there be inside the truck cab?

        • These will produce some mild drone within the truck cabin.

        Helpful (0)

        I do not understand you install it without flex pipe

        • Please check out our installation video to get an idea of how the installation works.

        Helpful (0)

        What is the mufflers total length? What is the exhaust tips total length?

        • The mufflers length is approx 27.5" overall. The Tips are 12" long.

        Helpful (0)

        will this work with the fuel management system without sounding like a putt, putt machine when only 4 cylinders are firing?

        • The MBRP 3 in. XP Series Dual Exhaust System is a standard exhaust and will not change any part of its configuration when your truck goes in to active fuel management/cylinder cut off mode.

        Helpful (0)
        Post Your Question

          Customer Reviews (4) Write a Review

          Overall Rating 4.2

          out of 5 stars

          Installation Time:Full Day

          Installation Cost:$100-$250

          • Loudness / Volume 4 4
          • Exhaust Note 4.5 4.5
          • Fit & Finish 5 5
          • Bang For Your Buck 4.75 4.8

          • 5/5

            Installation Time: Afternoon

            February 22, 2019

            Review from MBRP 3 in. XP Series Dual Exhaust System - Rear Exit (14-18 5.3L Silverado 1500)

            Ama Tx

            Very nice! High quality... My truck sounds mean....meeann. Excellent fit!!


            Year: 2018 Submodel: Custom Engine: 5.3L V8

            Helpful (1)

          • 2/5

            Installation Time: Afternoon

            November 28, 2018

            Review from MBRP 3 in. XP Series Dual Exhaust System - Rear Exit (14-18 5.3L Silverado 1500)

            Noise level

            Wasn't nearly as loud as i would have thought, no noise through the entire power band, needed professional cutting and shaping to fit 2016 silverado


            Year: 2016 Submodel: LT Engine: 5.3L V8

            Helpful (7)

          • 5/5

            Installation Time: Afternoon

            September 13, 2018

            Review from MBRP 3 in. XP Series Dual Exhaust System - Rear Exit (14-18 5.3L Silverado 1500)

            Very Nice!

            It took a little longer than I expected after reading multiple reviews on the exhaust. I was not supposed to have to cut my extension pipe for it to fit on my truck but after examining the set up I ended up cutting a small part of the extension pipe to better fit everything. Love the sound and performance of it. Mild drone in the V4 mode on my 2014 Silverado but will likely adjust and get rid of that with a tuner in the future. Mpg went up as well paired with the KandN cold air intake.


            Year: 2014 Engine: 5.3L V8

            Helpful (11)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            January 01, 2018

            Review from MBRP 3 in. XP Series Dual Exhaust System - Rear Exit (14-18 5.3L Silverado 1500)

            Sounds and Looks Great

            Just had this system installed on my 14 Sierra All Terrain and it has a Great Sound and I also Added 5in tips which make it sound even better... NOW ONE NOTE, it is NOT a full 3in system!!!!!!! From the muffler back to the bumper the pipes are 21/2in, NOT 3in... Aside from that, it seems to be the best bang for the buck that I have found so I'll see how it works out... I'm a MAGNAFLOW user, but this shinny muffler seems to have that same mellow sound, unlike that other flow hollow beer can sounding muffler that seems to be so popular...Also with my KandN cold air intake, when you put your foot into it wow, makes you want to do it all the time...


            Year: 2014 Engine: 5.3L V8

            Helpful (19)

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