Win A 2018 RTR Spec 3 Mustang! Enter Now!
Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST

Free Shipping On Orders Over $49. Details

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

Market Price $9,984.49 You Save 10% ($989.49)
Our Price


FREE Shipping
  • Item 389328
  • MPN# 2015 GT-55mm

Choose options to add to cart

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?
  • GT - 15, 16, 17

Most Helpful Reviews

Easy kit very sweet

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

Helpful (15)


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 ...

Read More
Helpful (15)

Overall Rating 4.8 out of 5 stars
Read All 4 Reviews

Customer Photos (4) Submit Your Photo

View All 4 Photos

You Might Also Like

44 Questions / 6 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 (3)

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 (2)

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)

I bought a 2017 Roush Warrior Scout with RS1 supercharger. Are you able to add the Hellion Twin Turbo kit to this setup?


  • The Hellion Twin Turbo will work with your car but will require the supercharger to come off. Both applications can work together but will require a lot of custom work.


Helpful (0)

how reliable are these turbo kits


  • Hellion is one of the most reputable and reliable supercharger/turbocharger companies in the entire racing industry. Very few and the far between have any issues with these kits as they are all made to order by hand.


Helpful (0)

Hello, I'm looking to add 100-200 HP to my stock GT. Will this need any additional mods to the stock engine or will the kit have all I need? Plus, is it troublesome to install and uninstall?


  • The Hellion Twin Turbo - Complete Kit will be a full complete kit and will come with everything you need to bolt this to your car. As far as the install this will be a difficult item to install and can take a day or more.


Helpful (0)

More Products You Might Like

Customer Reviews (4) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Shop Install

Installation Cost:$1000+

  • Performance Gain 4.5 4.5
  • Fit 4.75 4.8

  • 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 (15)

  • 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 (15)

  • 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 (10)

  • 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 (0)

Related Mustang Categories