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MBRP 1-7/8 in. Long Tube Headers w/ Off-Road H-Pipe (11-14 GT)

Market Price $1,441.99 You Save 12% ($167.00)
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$1,274.99 (kit)

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  • Item 390868

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    Features, Video & Details

    • Increases Horsepower and Torque
    • Raspy Race Car Growl
    • Long Tube Header Design
    • Free Flowing 1-7/8" Mandrel-Bent Tubing
    • T304 Stainless Steel Construction
    • Non-Catted Shorty H-Pipe Included
    • Intended for Off-Road, Track Use Only
    • Compatible with MBRP Street, MBRP Race or OEM Cat-Back
    • Fits All 2011-2014 GT Mustangs

    Review & Installation Video

    Review & Install Video

    You Have the Power. Three inch free-flowing mandrel-bent tubing will get your 5.0L engine rocking, expelling exhaust fast, boosting fuel efficiency and providing long lasting performance for your Mustang GT. This Long Tube and H-Pipe System by MBRP includes 1-7/8" primary tubes crafted from T304 stainless, providing optimal flow to the GT powertrain and maximizing overall performance.

    Dyno Proven Construction. This Exhaust Kit has been through endless hours of Dyno and street testing. Every part has been modified to perfection and offers ultra long durability. Crafted from high quality T304 stainless steel, this 1-7/8" x 3" Long Tube Header with H-Pipe features mandrel-bends for superior exhaust flow. Upgrading with this kit will deliver a killer sound and performance combo, making you wish you took the plunge earlier.

    Installation. This MBRP Header and Mid Pipe Kit offers everything you'll need in one box for a custom fit, including 1-7/8" x 3" Long Tube Headers, Off-Road H-Pipe, front and rear O2 extensions, all the necessary hardware and detailed instructions.

    Recommended Upgrade. To realize the full power potential that this Long Tube Header and Off-Road H-Pipe combo kit has to offer, AmericanMuscle highly recommends a Custom Tune with a Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

    Application. The MBRP Long Tube and Off-Road H-Pipe Kit is a perfect performance upgrade for all 2011-2014 GT Mustangs equipped with MBRP Street Cat-Back Exhaust, MBRP Race Cat-Back Exhaust or OEM Exhaust System.

    Technical Notes. This MBRP product may not be legal for use on pollution controlled motor vehicles; intended for off road use only.

    Fitment: 2011 2012 2013 2014 Details

    MPN# S7231304

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (2) Long Tube Headers
    • (1) H-Pipe
    • (3) Clamps
    • (4) O2 Extensions
    • Installation Hardware
    Installation Info
    Tech Specs
    Header Specifications
    Header Type: Long Tube Finish: Natural
    Type Mid Pipe Required: Shorty - Included Fitment: 2011-2014 GT

    Mid Pipe Specifications
    Style Mid Pipe: Shorty H-Pipe Type Headers Required: Long Tube - Included
    Piping Material: T304 Stainless Steel Piping Size: 3"
    Catalytic Converter: No - Off-Road Fitment: 2011-2014 GT
    Will it fit my Mustang?

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    Questions & Answers (11)

    5 Top Rated Questions

    What are the differences in quality between this kit or Stainless Works and Kooks? Does anyone who have these installed have any issues with gaskets, leaking, overheating, rusting, etc? Also, what type of welding job is this....Tig or Mig?

    • All three headers are going to have a 304 stainless steel construction. All of them are going to be TIG welded. The only difference between them would simply be the design of the piping. I suggest checking out some reviews on each of the headers to see what other people are saying about them. None of them should have issues with gaskets, exhaust leaks, or rusting. They will discolor in time since they do not have a ceramic coating.

    Helpful (1)

    Can this LT/H-Pipe Kit bolt to the Roush Axle-Back Exhaust w/ Dual Chamber Tips, part#421410?

    • Axlebacks and midpipes do not touch. You will have stock piping in between that these will be connecting to.

    Helpful (1)

    Do you need a tune for it? And what would the effects be if you did not have a tune for it after putting these on?

    • The MBRP 1-7/8 in. Long Tube Headers will need a tune to adjust for the O2 sensors being moved further downstream in the exhaust. Without a tune you may experience idle surge and incorrect air/fuel ratios.

    Helpful (0)

    do these come with gaskets? or do I need them?

    • Yes, this will include all installation hardware, including the gaskets.

    Helpful (0)

    I have aftermarket 2 3/4 inch over axle pipes. Will this H pipe work connect to that size? I ask because some of the questions previously asked have conflicting information between setups and want to clarify the h pipe end that connects to over axle pipe. Thank you

    • The MBRP 1-7/8 in. Long Tube Headers with Off-Road H-Pipe will be reduced at the H pipe connection to the catback to OEM exhaust diameter. This will allow you to connect the H pipe to any catback designed to be a direct, no cutting replacement for the OEM catback. Without knowing the brand of your exhaust, we would be unable to confirm fitment beyond this.

    Helpful (0)
    Post Your Question
    6 More Questions
    With a Bama 93 race tune, what increased horses and T can one expect.? 1 answer
    will Roush axle backs work with this combo 1 answer
    Does this come with gaskets for install? 1 answer
    Do we need check engine light eliminators like on the 04 models or how does keeping the light off work with the newer ones. I will be getting an '11-'14 in the near future 1 answer
    Already have MBRP Cat back race series exhaust on my 2014 mustang GT Convertible. Will this header and off road H pipe kit work with the convertible? 1 answer
    Will this fit the stock exhaust (H pipe connecting to the over axle)? And will this work with the MBRP Race series Cat back? 1 answer

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    Customer Reviews (4) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Full Day

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

    • 5/5

      Installation Time: Full Day

      July 01, 2018

      great for the money

      great headers for the price and great quality definitely a 3 out of 3 on the difficulty scale I did have to remove the passenger side motor mount but was able to keep the drivers side motor mount in it was loosed but still in place I also did it without having to drop the k member so yes install was hard I would say if your not as good with wrenching on cars the extra 500 bucks to have someone else install these isn't bad takes away the headache of doing it your self all in all great headers love the sound matched up with my mbar race cat back exhaust and no cats


      Year: 2014 Submodel: GT

      Helpful (6)

    • 5/5

      Installation Time: Afternoon

      March 03, 2018

      For really well.

      First out of the box they look beautiful. They fit amazing. I was able to install them in about 5 hours, I will say that I am a mechanic and I have access to every tool imaginable and I used a lift. I didn’t drop the k-member I just lifted the motor a little and took the motor mounts off. They literally just slide right in. The instructions say to install the bottom bolts and let the header hang but you will have a hard time getting the top bolts in as the header tubes run almost directly over some of the bolts so I started the top bolts and pushed the headers up and then started a bottom bolt. The h-pipe fits great also. I have zero complaints.


      Year: 2011 Submodel: GT

      Helpful (10)

    • 5/5

      Installation Time: Weekend

      October 12, 2016

      Great combo!

      I paired this with my MBRPstreet cat back and man does she scream! It's got a deep almost throaty sound and it is absolutely amazing! Price is a little steep but with what you're getting you can't beat it. I went from stock headers out borla atak and this hands down beats it in every aspect. You will not be disappointed! But the install... this install took me 16 ish hours on jackstands. You'll learn a few new curse words I'm sure trying to squeeze the headers in there but once you have the passenger side in it goes by fairly quick. But good luck!


      Year: 2011 Submodel: GT

      Helpful (12)

    • 5/5

      Installation Time: Afternoon

      October 12, 2016


      These long tubeheaders greater enganced the breathing capability of my car, greatly enhanced the sound from the exhaust


      Year: 2011 Submodel: V6

      Helpful (11)

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