Vertex Pistons . 23381B

All Pistons are heat treated with a T-5 hardening and tempering cycle All piston skirts are coated with a high tech molybdenum disulphite coating for faster break in time and increased piston life Replica pistons are OE replacements, matching bore and compression ratio Kits include piston, rings, wrist pin and circlipsSold per cylinder

Bore: 94.95mm Compression: 11.9:1 Compression Sizing: Standard Bore Exact fit A, B, or C pistons match your cylinder bore perfectly to maximize power and performance while reducing blow-by and oil consumption. 2-stroke pistons have an 18% silicon content which decreases wear and thermal expansion, allowing for tighter running tolerances for more power, less noise, and longer lifespan. High-tech Molybdenum Disulphide (MOS2) skirt coating for reduced wear and improved break-in. 4-stroke pistons are forged from either 2618 or 3032 alloys for superior strength and durabiltiy. All piston kits include piston, rings, wrist pin, and circlips. Cast and Forged Replica pistons are OE replacements with stock OE compression ratios. Cast and Forged Race pistons are unique with only one compression ring. Forged Hi-Comp pistons increase compression and power over Replica pistons. Forged GP Racer's Choice pistons have T-box forgings, unique dome profiles, surface treatments, and increased compression ratios to produce more power, strength, and durability. Big Bore pistons increase displacement and power while maintaining stock compression ratios. This item fits the following vehicle applications: compatible with KTM 530 EXC-R 2008-2011