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Hellion Twin Turbo Complete Kit (15-17 GT)

Item 389328
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      Review & Installation Video

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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

      MPN# 2015 GT-55mm

      2015 GT-62mm

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (5)

      Write a Review

      Ratings Summary

      4.2 out of 5 overall rating from 5 customers

      Installation Time: Shop Install

      Installation Cost: $1000+

      • December 04, 2017

        2 2015 GT - Kyles Installation Time: Shop Install Installation Cost: $1000+

        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.

        Helpful (60)
      • November 13, 2017

        5 2017 GT - NicholasA Installation Time: Shop Install Installation Cost: $1000+

        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.

        Helpful (52)
      • August 15, 2017

        5 2013 GT - Bobbystepp

        Easy kit very sweet

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

        Helpful (59)
      • July 13, 2017

        5 2015 GT - ScottS Installation Time: Shop Install Installation Cost: $1000+

        Pure power

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

        Helpful (40)
      • February 15, 2016

        4 2015 GT - Monavillen Installation Time: Weekend


        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.

        Helpful (90)

      Questions & Answers (88 answers)

      5 Top Rated Questions

      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 (99)

      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 (10)

      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.

      Helpful (7)

      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 (3)

      Do I need to increase piston ring gap?

      • Ring gap does not need to be changed for the standard kit, however if you are planning for higher power numbers than the base kit delivers, we would recommend adjusting ring gap.

      Helpful (2)
      10 More Questions
      "500 to 1200 Horsepower to the pavement" Does that mean "in addition to" the hp in the stock GT, or the total amount of hp with the kit? 1 answer
      I have a stock 2017 GT 6 speed. Other than the kit itself, what else would be recommended for me to upgrade to handle this kind of power? I'm speaking a minimum of 700 crank HP with the 62mm turbo 1 answer
      Do I need to replace my existing OEM Exhausts? If so what kind would you recommend CAT BACK/AXLE BACK or anything else? Also what brand, I was thinking of Borla, Corsa or anything else that would be a best match with the 62mm twin turbo. I want to create a daily driver car that has 900 RWHP. 1 answer
      with this turbo will you have any check engine lights on if so will they affect the car 1 answer
      Is the turbo kit california legal and does it comply with smog? 1 answer
      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? 1 answer
      If i have a supercharger already, will I need another tune? How do i get maximum power out of these? 1 answer
      I have a 2015 Gt with mmr stage 3 turbo cams, id1000s injectors and cobra jet intake manifold. Would the hellion twin turbo be an I deal setup with my cams? 0 answer
      Can i put on a 62mm complete kit on my stock 2016 mustang GT 0 answer

      Installation & What's in the Box

      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

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