FAS 850 Package | Hellcat Platform

The FAS 850 Package for the Hellcat Platform is a turn-key performance build designed to push Dodge Challenger and Charger SRT Hellcat vehicles to a reliable 850 wheel horsepower while maintaining the factory drivability and refinement that makes the Hellcat platform so appealing as a daily driver and performance car. This package represents a carefully calibrated step up from the 800HP build, delivering more power with the same professional attention to reliability and streetability. The build is centered on the 6.2L supercharged HEMI and includes a custom pulley kit to maximize boost pressure, high-flow injectors sized for the increased fuel demand, a pinned crankshaft to reinforce the rotating assembly against the elevated torque loads, and a thermostat upgrade for improved thermal management under hard use. Supporting cooling modifications help keep intake air temperatures in check at the higher boost levels. Once all hardware is in place, the vehicle is brought to the F.A.S. Motorsports dyno for a full custom tune, where ignition timing, fuel delivery, boost targets, and transmission calibration are all optimized for maximum performance with the installed components. The result is a crisp, responsive power delivery that's strong from idle to redline, with a power curve that drivers can trust for both aggressive street use and occasional track days. Every FAS 850 Hellcat Package is built, installed, and tuned in-house by the F.A.S. Motorsports team to ensure each build meets the company's high standards for power, reliability, and driveability.