High horsepower Drag, Short Course. Mud or 4400 class stroker kit intended for the most aggressive clutch and anti-lag 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.