ستروكر محركات ال اس 425 Pistons: Diamond 23429 piston 4.060” (Custom low weight pistons) MAHLE Piston Rings Compression @ 70CC = 11.7:1 Scat Pro Comp I-Beam Connecting Rods 6.100” Lunati Crankshaft 4.100” Balances tungsten material ACL H_Series Race Bearings