EJ257B DUAL AVCS Stroker Kits The BC stroker kit for the Subaru EJ25 engine utilizes a custom 83mm monster stroke steel billet crankshaft not a reworked factory EJ25 crank. Depending on bore size that you decide the BC kit will take you up to a 2.71L with a safe 102mm bore. A stock stroke version is also available (79mm see below). As usual each BC kit features custom CP forged aluminum pistons premium alloy wrist pins full ring pack and buttons. Big time power and torque gains. BC Sportsman rods rated to 600 horsepower BC Pro Series rods rated to 800 horsepower. BC 4340 billet steel crankshaft (83mm stroke). BC 4340 Sportsman or Pro Series connecting rods. CP or JE aluminum forged pistons (any bore size any compression ratio). 5100 Series carbon steel alloy wrist pins. 9310 Series pin upgrade avail. Ductile iron plasma top rings tapered second ring low tension oil rings. Fully system balanced and ready to install. (50% deposit required) For more information visit http://www.briancrower.com/makes/subaru/ej257b_stroker.shtml