The four versions are:
-- HPE650: 658 bhp at 6,200 rpm
-- HPE700: 707 bhp at 6,300 rpm
-- HPE800: 800 bhp at 6,200 rpm
-- HPE1000: 1,021 bhp at 6,400 rpm
The HPE1000 twin turbo upgrade includes: 427-cubic-inch LSX Engine, an upgraded fuel system, forged rods, pistons and cranks, high-flow cylinder heads, an air-to-air intercooler, ball bearing turbos, and high-flow K&N air filter.