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850 HP S/C Mustang by Boost Works is a Subtle Hellcat Killer – Photo Gallery

Boost Works/K.B. 850 HP Supercharger Package for 2015 Ford Mustang GT 10 photos
Photo: Boost Works
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Look at that guy wearing flip-flops, Nike shorts and a Nike T-shirt. Look at him! At first glance, he seems to be just a normal guy, standing proudly next to his 50th Anniversary Mustang GT. But that's no ordinary bloke and no ordinary S550 Mustang there because Jeff is driving an 850-plus horsepower muscle car.
Good on you, Jeff! We genuinely admire that the owner of the 2015 Ford Mustang in the adjacent photograph didn't go all out, sprucing the design of the car with steroids. If it weren't a two-door fastback body, you could almost mistake that Mustang with a sleeper. Z06s owners will be thoroughly surprised if they'll have the nerve to race Jeff at the lights.

Officially dubbed the Boost Works/K.B. 850 HP H.O. Supercharger Package, the only way you can understand why this Mustang is so rad is by popping the hood. Available in a polished finish or in anodized black, that's a 3.2-liter Kenne Bell head unit, the biggest twin screw supercharger available for the S550-gen Mustang that will fit in the engine bay without modifications to the hood. No subframe spacers either.

The 4x6 rotor profile and liquid cooled snout of this mid-frame supercharger is the result of 8 months of testing in Boost Works' shop. In this 50th Anniversary Mustang's case, the finished product pulled a dyno-approved 733 horsepower at 7,650 rpm and 674.2 lb-ft (914 Nm) at 6,150 rpm at the rear wheels.

With LD headers and an OD lower balancer, one would ask himself "SRT Hellcat what now?" for a good reason. When Boost Works were testing a 660 RWHP variant of this package, their Mustang GT prototype ran low 10s on the 1/4-mile, which is faster than a 2015 Dodge Challenger SRT Hellcat wearing drag radials.

Available for both the automatic and manual S550 Mustang GT, here are the key features of the package:

- KB 3.2-liter supercharger (Tested to 1200 hp)
- KB High-capacity Mammoth Inlet (Tested to 1,500 hp)
- KB Lower manifold and high capacity intercooler core (Tested to 1,500 hp)
- KB High-capacity heat exchanger (Tested to 1,500 hp)
- MMR billet oil pump gears
- MMR billet timing chain sprocket
- KB 168 mm billet big oval throttle body
- KB 4.5-inch cold air inlet tube and filter
- KB 20v Pro Series Boost-A-Pump
- Injector Dynamics ID1000 Fuel Injectors
- SCT X4 Handheld
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About the author: Mircea Panait
Mircea Panait profile photo

After a 1:43 scale model of a Ferrari 250 GTO sparked Mircea's interest for cars when he was a kid, an early internship at Top Gear sealed his career path. He's most interested in muscle cars and American trucks, but he takes a passing interest in quirky kei cars as well.
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