Hellion Street Sleeper Twin Turbo System (18-20 GT)

Hellion Power Systems




  • Twin Turbo Tuner Kit - Requires Custom Tune and Fuel
  • Standard 62mm Turbos
  • Capable of 500 to 1,200+ Horsepower
  • Large Vertical Flow Dual Inlet Intercooler
  • 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 2018-2020 5.0L GT

The next big thing is here! Recognizing the popularity of huge horsepower street cars with the ultimate “sleeper” image, Hellion designed the most innovative twin-turbo system in history — the Street Sleeper! We have listened to our customers who desired a different design for the S550 Mustangs. This new system places the turbos in a hidden location — all factory hoses, airbox and connections stay intact. You can open the hood and it will just look like any stock Coyote V8 with a cold-air intake. However, it is a twin-turbo system that is fully adjustable from five to 40 pounds of boost and performance levels anywhere from 600 to over 2,000 horsepower.


With over 15 years in building hidden turbo systems, Hellion designed a true bolt-on system. There is no need to tap the oil pan or modify any factory sheet metal. The simple installation can be performed in under a day.


While the base Street Sleeper system is a tuner kit with entry-level, cast-wheel 62mm turbos, Hellion naturally offers a massive number of available upgrades, including choice of turbo size, turbo brand, injector size, tuning options, custom-tuning sessions, fuel system upgrades and even complete Blackout packages! Contact info@mospeedusa.com for a custom quote!


This Hellion Twin Turbo Kit is specifically designed for use on the 2018-2020 GT Mustangs equipped with the Coyote 4V 5.0L V8 engine.

NOTE: Hellion Turbo Systems are built to order for our customers and accordingly, upon placing your order, a representative of Mospeed Performance will contact you to obtain additional information about your vehicle. Because of this there can be a 5 to 7 day lead time on orders once your information is received.