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Hellion Twin Turbo - Complete Kit (15-17 GT)

Market Price $9,984.49 You Save 10% ($989.49)
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  • Item 389328
  • MPN# 2015 GT-55mm

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    Features & Details

    • Twin Turbo - Complete Kit
    • Choice of 55mm or 62mm Turbos
    • Capable of 500 to 1,200+ Horsepower
    • Large Vertical Flow Dual Inlet Intercooler
    • Includes Hand Held Tuner with Program
    • No Cutting Required for an Easy Installation
    • Retains the A/C and Other Factory Accessories
    • Hellion Lifetime Warranty on All Stainless Parts
    • Precision 1 Year Warranty Against Defects in Material/Workmanship
    • Fits 2015-2017 5.0L GT Mustangs
    More Power! The Coyote powered S550 GT Mustangs came with an awesome 435 Horsepower and 400 lb/ft of Torque from the factory, but after installing a Hellion Twin Turbo Kit, you'll be planting a ground pounding 500 to 1200 Horsepower to the pavement (depending on custom tuning and fuel upgrades).

    55mm or 62mm Turbos. This Hellion Twin Turbo Tuner Kit features your choice of two Precision 55mm or 62mm Turbos. The 55mm "Quick Spool" Turbos are perfect for use with stock engines and provide virtually no turbo lag - ideal for street driven daily drivers. The 62mm turbo option will have more lag than the 55m turbos, but can support well over 1200 rwhp on a properly built engine.

    Complete Kit. The Hellion Mustang Twin Turbo Kit comes with (2) Precision 55mm Turbos, (2) Turbosmart 40mm Wastegates, (2) Turbosmart VEE port bypass valves, 47 LB fuel injectors, a large vertical flow dual inlet intercooler, a handheld programmer with base tune installed and all the required parts and hardware needed to upgrade your mild manner pony to a wild snarling beast.

    No Cutting Required. Designed to install under the stock hood with no cutting required, this Hellion Turbo system retains all the factory accessories including air conditioning for complete driver comfort.

    Application. This Hellion Twin Turbo Kit is specifically designed for use on the 2015-2017 GT Mustangs equipped with the Coyote 4V 5.0L V8 engine. - Please select turbo size from options listed above.

    Note: Coupon codes cannot be applied to this product.

    Please Note. Hellion Turbo Systems are built to order for our customers and accordingly, we require you to submit additional information about your vehicle using this form. Because of this there can be a 5 to 7 day lead time on orders once your information is received.

    Once the Customer Information Form is filled out, please email it to with your Order Number in the Subject line, so the order can be processed.

    Fitment: 2015 2016 2017 Details

    Installation Info
    Tech Specs
    • Complete Kit - includes programmer with base tune
    • Two Precision 55mm Turbo
    • Stainless steel tubing
    • Professional Installation Recommended
    • Hellion lifetime warranty on all stainless parts
    • Precision 1 year warranty against defects in material/workmanship
    Will it fit my Mustang?

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    57 Questions / 5 Answers

    Ask a Question

    My question is in the hp results. I have a stock GT, it is a daily driver and I am looking to get big gains. The listing says for the smaller turbo you will see gains to 500hp. Is that 500 rear wheel hp or to the crank? I would like to get in the ballpark of 700-750 rear wheel hp. Would I need to opt for the larger turbo and the tuner kit?


    • If you want 700-750 RWHP, just buy a Whipple supercharger system, contact Whipple for their "Roval" throttle body and larger injectors for an easy 770 RWHP. The Whipple supercharger system is easy to install and performs flawlessly. Plus, you can run long tube headers, high flow cats, and a full 3" exhaust system for even more power and better sound. How do I know? Because I am running this set up on my 2016 GT with the Performance Pack....It is reliable, sounds incredible, and is mind numbingly fast...


    Helpful (9)

    Do I need BBK shorty tube headers or can u run kooks long tube headers? haven't found any answers on this.


    • Hi, This Hellion Twin Turbo - Complete Kit will include new set of turbo manifolds which will be used instead of headers, So you will have no use for shorty or long tube headers.

      Chris J

    Helpful (3)

    If i have a supercharger already, will I need another tune? How do i get maximum power out of these?


    • You will need to retune when you put on the twin turbos and take off the supercharger.


    Helpful (1)

    What is the max HP the 55mm Kit can produce? I'm trying to get to at least 900 RWHP and want to order the correct kit that will supply that.


    • The max HP without any fuel injector changes or adding a boost a pump would be around 640HP. If you are looking to get around the 900HP mark, you will need the twin turbo 62mm Hellion with ID1300 fuel injectors and a boost a pump.


    Helpful (1)

    Will it fit a 2018 GT?


    • The Hellion Twin Turbo - Complete Kitwas designed for 2015-2017 GT's. This product would not work for your 2018 GT.


    Helpful (0)

    I have a 2017 Mustang GT 5.0 with a 6R80 auto. transmission. What other modifications are recommended if I want to install the Hellion Twin Turbo 55mm kit to my stock Mustang and get close to 800HP without damaging my car?


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    Customer Reviews (5) Write a Review

    Overall Rating 4.2

    out of 5 stars

    Installation Time:Shop Install

    Installation Cost:$1000+

    • Performance Gain 4.4 4.4
    • Fit 4 4

    • 2/5

      Installation Time: Shop Install

      Installation Cost: $1000+

      December 04, 2017

      Horrible fitment

      This kit fits absolutely horrible, ifk if a jig is off but I’ve installed 4 kits so far... every single one off In the same spots. V-band flanges are always warped, need to be sanded flat. Instructions are terrible, whoever writes the notes should take a look at kenne bell instructions. V band clamps are cheap and you can only get them through hellion. It gets 2 stars because the kit does make power.


      Year: 2015 Submodel: GT

      Helpful (22)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $1000+

      November 13, 2017

      The most unique mustang possible

      Nobody has these. Everyone has superchargers. Their literally all supercharged in my area. This thing gets looks left and right and makes ungodly amounts of horsepower. I’m running low boost at 7psi and this thing pulls like a train.


      Year: 2017 Submodel: GT

      Helpful (20)

    • 5/5

      August 15, 2017

      Easy kit very sweet

      It n a friend but in time it was wrap n in 9second quarter mile 140mph


      Year: 2013 Submodel: GT

      Helpful (38)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $1000+

      July 13, 2017

      Pure power

      Best product on the market for turbos for the mustang. If you want more horsepower. This is the product for you.


      Year: 2015 Submodel: GT

      Helpful (23)

    • 4/5

      Installation Time: Weekend

      February 15, 2016


      The kit its self is a beautiful kit and the fitment of the piping was decent. Some of it took some forcing to get into place but all in all it went. The problem with the kit if you get the EBCS is the lack of hoses needed to install it. I needed to buy extra things like heat wrap and what not that were not suppled in the needed amounts.


      Year: 2015 Submodel: GT Corpus Christi, TX

      Helpful (51)

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