The Hellcat uses a forged-steel crankshaft with induction-hardened bearing surfaces. According to Chrysler, the result is a crankshaft that can withstand cylinder pressures of 1,595 psi. For you race guys, an SFI approval is sure to happen as the crankshaft damper has been tested to 13,000 rpm. Inside, high-strength forged pistons connect to powder-forged connecting rods with high-load-capacity bushings and carbon-coated piston pins. Like all modern Hemis, the supercharged 6.2L features aluminum-alloy cylinder heads that are optimized for superior thermal conductivity. Atop each head is a die-cast aluminum rocker cover in the appropriate Hemi Orange. The all-new, iron-block V8 engine is equipped with either an upgraded six-speed manual transmission or, for the fist time in an SRT Challenger, an automatic transmission. Like the other V6 and V8 Challengers, the SRT can be bolted to a TorqueFlite eight-speed, which has the capacity for up to 738 lb-ft, and a wide 7.04 gear spread versus the 4.31 gear spread of the five-speed NAG1 automatic it replaces.