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 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!
- Multiple turbo options available
- Large vertical flow core intercooler (highest flow bar/plate core available)
- Twin Turbosmart Comp-Gate 40 wastegates
- Twin Turbosmart VEE port bypass valves
- More Power Potential
- Easier On Your Engine
- Factory Fitment
- Retention of All Accessories
- Unsurpassed Technical Support
- Lifetime Warranty On All Stainless Parts