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Stainless Power 1-7/8 in. Long Tube Off-Road Headers (15-17 GT w/ SW Cat-Back)

Market Price $1,112.99 You Save 12% ($129.74)
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  • Item 390795-B
  • MPN# SM15H3OR

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    Features & Details

    • Increases Horsepower and Torque
    • Long Tube Header Design
    • 1-7/8" Primary Tubes with 3" Collector
    • Free Flowing Mandrel-Bent Tubing
    • 304 Stainless Steel Construction - Natural Finish
    • Intended for Off-Road, Track Use Only
    • Requires Stainless Works 3" Cat-Back Exhaust Part# 384843
    • 24-Month Guarantee on Material and Workmanship
    • Designed by Stainless Works
    • Fits Left Hand Drive Models Only
    • Fits 2015-2017 GT Mustangs with Stainless Works 3" Cat-Back
    A Vital Addition for High End Performance. Upgrading your exhaust system can transform your 2015-2017 GT Mustang from standard to a high-end performance vehicle. These Stainless Power Long Tube Off-Road Headers are designed to integrate with a 3" Stainless Works Cat-Back for the ultimate enhancement package. Fashioned without the neck-down factory style, this system is packed with more power.

    Superior Construction. Stainless Power Headers are manufactured to Stainless Works exact design specifications. Stainless Power Headers are CNC mandrel bent from 1-7/8" diameter, 304 stainless steel tubing for excellent exhaust flow and long lasting corrosion resistance. These Long Tube Headers feature TIG welded construction, as well as laser cut 3/8" header flanges, for additional strength and leak-free performance.

    24-Month Guarantee. Stainless Power is Stainless Works value-line brand of exhaust products designed for the cost conscious consumer that wants a high-quality product at a reasonable price. Stainless Power is so confident in the quality of their Long Tube Headers that they are backed by a 24-Month guarantee on material and workmanship.

    Calibration Required. Installation of these Long Tube Headers will require the use of a Handheld Tuner to reprogram your Mustang's computer (ECU) for proper operation. By reprogramming the ECU, you will be able to realize the full power potential that these Long Tube Headers have to offer.

    Application. These Stainless Power Long Tube Off-Road Headers are specifically designed to fit the 2015 to 2017 GT Mustang equipped with the Coyote 5.0L DOHC V8 engine. Requires Stainless Works 3" Cat-Back Exhaust System, part# 384843, for proper installation.

    Technical Note. Not legal for use on pollution controlled motor vehicles; intended for off road use only. These Headers are intended for left hand drive applications only.

    Fitment: 2015 2016 2017 Details

    What's in the Box
    • (1) Driver Side Header
    • (1) Passenger Side Header
    • (1) Driver Side Connection Pipe
    • (1) Passenger Connection Pipe
    • (4) Clamps
    • (2) O2 Extensions
    • Hardware
    Installation Info
    Tech Specs
    Header Specifications
    Header Type: Long Tube Type Mid Pipe Required: Requires Stainless Works Cat-Back # 384843
    Material: Stainless Steel Finish: Natural
    Catalytic Converter: "No" - For Off-Road Use Only Fitment: 2015-2017 GT
    Will it fit my Mustang?

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    4 Questions / 4 Answers

    Ask a Question

    Do you sell just the off road connector pipes?


    • We do not sell the connection pipes from the Stainless Power 1-7/8 in. Long Tube Off-Road Headers separately.


    Helpful (0)

    Will these headers work with the ford racing boss style x pipe with side exhaust?


    • The Stainless Power 1-7/8 in. Long Tube Off-Road Headers will not work with the Boss 302 X-pipe with the side cutouts.


    Helpful (0)

    Will these headers fit any 3in cat back or only the sw cat back


    • Hey Daniel, So this set up is actually specifically for the SW 3" cat back exhaust, to fit other applications it would have to have a custom installation.


    Helpful (0)

    What is the difference between these headers and the Stainless Works #384845 headers? They are made by the same people so why 2 different sets? Will these and the #384845 headers fit the #384842 cat back exhaust? Thanks


    • These are very similar headers as Stainless Power is a lower tier version of the Stainless Works. The performance, sound and setup will all plug in the same way. As for if they will both work with the 3" retro chambered cat-back, they will as they both can fit with the Stainless Works catback item #384843 as those exhausts are also very similar.


    Helpful (0)

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    Customer Reviews (2) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Full Day

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

    • 5/5

      Installation Time: Weekend

      April 15, 2017

      Worth the work

      Do not attempt to install these if you don't have access to a hoist (lift) and a good set of tools. Also, be prepared to take out the factory studs that hold the headers to the block (it takes a special bit to get them out so figure out what you need). Everything under the car is VERY tight and getting them in took a lot of uncomfortable wrenching. Aside from installment, I love them. Paired with the Stainless Works LMF 3" system they are crazy loud and sound great. After tuning I have gained a ton of power. Well worth it.


      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      October 27, 2016


      Paired with the sw cat back this setup is insane! Super loud and awesome for that mean muscle car sound.


      Year: 2016 Submodel: GT

      Helpful (1)

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