PISTON KIT GM SPEEDWAY 90.00, WOSSNER 8811DC C

This Wossner forged piston kit with a 90.02mm bore (+0.02mm oversize) is designed for all Speedway applications, including GM Speedway 499cc engines. Manufactured in Germany, it features a high-strength forged design and optimised thermal characteristics. The elliptical piston profile ensures even expansion and pressure distribution, reducing stress and preventing collapse under demanding operating conditions.

Features

• Forged construction for superior strength and thermal stability

• Engineered for efficient heat transfer from combustion to cylinder walls

• Elliptical profile ensures a uniform bearing surface during heat expansion

• Evenly distributes thrust loads to prevent localised pressure

• Manufactured in Germany

Specifications

• Bore: 90.02mm (+0.02mm Oversize)

• Actual bore: 89.94mm

• Display volume: 499 cm³

• Stroke: 78.50mm

• Clearance: 0.08mm

• Dome volume: +5.60 cm³

• Compression height: 22.00mm

Cross-Reference OEM Part Numbers

• 56-W9841.C

• 8811DC

• Pin Part Number: WP174

• Ring Set Part Number: 900ADS-2

Vehicle Fitments

• Speedway (All Models)

• GM Speedway 499cc