High horsepower Duner and Mod Drag, Short Course, Mud Bounty or Desert Racing stroker kit intended for OEM style, non pneumatic clutch setups. Builds full boost over 2000 rpm sooner. Includes EN40B billet stroker crank (73.5mm stroke) with added +.080" snout diameter, BC MOAR rods (4.606" c-to-c w/18mm Pin) with ARP 625+ Custom Age bolts and custom pistons in any bore and compression ratio.