This Wiseco Professional Series piston set is forged from 2618 aluminum for Nissan SR20 engines, including turbocharged builds. Each of the 4 pistons has an 86.50 mm bore and a 32.00 mm compression height with a flat top crown. Professional Series pistons are aimed at heavy to severe duty race builds.

Wiseco K557M865AP Piston Set Features:

• Made for Nissan SR20 engines
• 86.50 mm bore diameter with a 32.00 mm compression height
• Flat top crown design
• Forged from 2618 aluminum alloy
• ArmorGlide skirt coating for reduced friction, scuff resistance and quieter operation
• 0.8661 in. 5115 Steel floating wrist pin included
• Piston rings included: 1 mm top, 1.2 mm second and 3 mm oil ring
• Fully machined crown with precision ring grooves and an anti-detonation groove
• Forced pin oiling feeds the wrist pin bore
• Set of 4 pistons