Wiseco 4713M09000 Piston Kit - Standard Bore 89.92mm, 12.2:1 Compression chemical-engine-oil-15w60 Localized perforation areas improve ventilation

Localized perforation areas improve ventilation for cooling airflow on warm days

Die-cast construction with chrome-plating and non-slip rubber matting

Each Race Series system is developed in accordance with noise compliance regulations imposed by most racing sanctioning bodies worldwide

reducing the likelihood of breakage

Reliable design for confidence

Wiseco 4713M09000 Piston Kit - Standard Bore 89.92mm, 12.2:1 Compression chemical-engine-oil-15w60 Localized perforation areas improve ventilationBore: 89. 92mm Compression: 12. 2: 1 Compression Sizing: Standard Bore SPECIFICATIONS. Displacement: 398cc. Bore Standard: 90. 00mm. Bore Actual: 90. 00mm. Bore Oversize: STD. Stroke: 62. 60mm. Compression Ratio Actual: 12. 2: 1. Note: Cylinder deglazing required. ITEM CONTENTS. 35433XR 90. 00 mm Ring Set. CW20 ROUND WIRE PIN LOCKS 20MM (PAIR). S549 PistonPin 20mm x 2. 002in. NonChromed TW All Wiseco Pistons are forged from high silicon, low expansion