Hellion Street Sleeper® Hidden Twin Turbo System (HT-1819-SS) - 2018-2023 Mustang GT
The Hellion Street Sleeper® Hidden Twin Turbo System for the 2018–2023 Mustang GT is widely regarded as the gold standard of turbo kits for the modern Coyote platform. Designed for enthusiasts who demand extreme horsepower without sacrificing a factory-like appearance, this system delivers world-class performance while keeping the engine bay and exterior deceptively clean.
For over 25 years, Hellion Turbo has led the industry in designing record-setting turbo systems backed by real-world results and unmatched customer support. The Street Sleeper® concept was born from listening to customers who wanted massive power with a true sleeper image. By relocating the turbochargers to a hidden position, Hellion created the most innovative and capable twin turbo system ever offered for the S550 Mustang.
This system is fully adjustable from approximately 5 to 40 pounds of boost and supports power levels ranging from around 600 horsepower to well over 2,000 horsepower depending on turbo selection and supporting modifications. Simply put, no supercharger can match the efficiency, scalability, or outright performance potential of a Hellion twin turbo Mustang. It’s no coincidence that many owners convert to Hellion systems after reaching the limits of other power adders.
Unlike belt-driven systems that introduce parasitic loss, the Street Sleeper® twin turbo setup harnesses spent exhaust energy to make boost, delivering more usable power directly to the rear wheels. The result is explosive acceleration, stronger mid-range torque, and performance that continues to grow as your build evolves.
Engineered as a true bolt-on solution, this system requires no oil pan tapping and no cutting or modification of factory sheet metal. Most installations can be completed in under a day, making it one of the cleanest and most refined high-horsepower upgrades available for the 2018–2023 Mustang GT. While the base configuration includes entry-level 62mm turbochargers, Hellion offers extensive upgrade paths including larger T4 turbo options, fuel system enhancements, and complete Blackout packages for maximum stealth.
Features
- Street Sleeper® hidden twin turbo system for 2018–2023 Mustang GT
- Stealth turbo placement for a true sleeper appearance
- Boost adjustable from approximately 5 to 40 psi
- Horsepower capability from 600 to 2,000+ HP with proper setup
- Standard twin Hellion 62/62 turbochargers
- Optional T4 turbo upgrades available:
- 62/62 – 1,000+ HP
- 62/62B – 1,200+ HP
- 64/66R – 1,700+ HP
- 68/70 – 2,000+ HP
- Large vertical-flow intercooler with high-efficiency bar-and-plate core
- Full sheet-metal intercooler construction, built in the USA
- (2) Turbosmart Comp-Gate 40 wastegates
- (2) Turbosmart VEE Port bypass valves
- American-made stainless steel piping with lifetime warranty
- Exclusive Hellion turbo oiling system for long-term reliability
- Heavy-duty silicone couplers and stainless T-bolt clamps
- High-flow K&N air filters included
- Complete hardware kit and detailed at-home installation instructions
- Backed by knowledgeable Hellion customer support
- Does not include tuning or programming
Fitment
- 2018 Ford Mustang GT 5.0L
- 2019 Ford Mustang GT 5.0L
- 2020 Ford Mustang GT 5.0L
- 2021 Ford Mustang GT 5.0L
- 2022 Ford Mustang GT 5.0L
- 2023 Ford Mustang GT 5.0L
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