More Info, copied in some of it and take a look at the link for more pictures and story.......Ya gotta Love the Hellion Turbo's!......Not Me, but there will be those who do!
https://www.motortrend.com/news/first-look-twin-turbo-dodge-challenger-demon-170/
Hellion's proven 64/66R turbochargers support as much as 1,700 horsepower, but with a factory engine and drivetrain still intact, Urist decided 1,275 horsepower was a safe stopping point for the moment.
That comparison was informative, but the beauty of the Hellion kit is the incorporation of a TurboSmart boost controller. Adding or subtracting boost is just the push of a button away. By adding just six more pounds of boost than the factory supercharger delivers, the Go Mango monster belted out a whopping 1,275 horsepower and 1,204 lb-ft of torque. Since the engine and drivetrain are stock, Urist decided that was a safe place to stop—for now.
With a stout baseline of 932 horsepower at the rear wheels, the Demon 170 responded to Hellion twin turbochargers by rocking the rollers at The Dyno Edge to the tune of 1,275 horsepower and 1,204 lb-ft of torque, with just six additional pounds of boost beyond what the factory blower delivers—and that's through the remainder of the factory exhaust system.
"A lot of people might be concerned about aggressive changes on a rare car like this," Urist added. "Fear not—the Hellion system is a 100-percent bolt-on. Nothing is changed that cannot be put back. It is the best of both worlds."
Next up, the car is headed to Barth Tuning for more calibration work in preparation for its first turbocharged trip down the dragstrip. There, it will also receive a high-stall torque converter from Pro Torque to maximize the boost on launch. With factory Demon 170s already dipping into the 8-second zone with just over 900 horsepower at the wheels, what can a twin-turbo version accomplish with more than 1,300 horsepower? We shall soon find out.