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2Bros MCS LTD Company number 16176735 - Vat No. GB 508324506 - info@2bros-mx.com - Tel: 03301333748
This Wossner forged piston kit with a 90.04mm bore (+0.04mm oversize) is designed for all Speedway applications, including GM Speedway 499cc engines. Precision-forged in Germany, the piston features superior strength and optimal heat transfer capabilities. Its elliptical profile promotes uniform pressure distribution and expansion under thermal load, minimising stress and reducing the risk of piston failure.
Features
Forged construction for maximum strength and performance
Engineered for efficient heat dissipation from combustion to cylinder walls
Elliptical profile ensures consistent bearing surface under expansion
Reduces localised pressure and evenly distributes thrust loads
Manufactured in Germany
Specifications
Bore: 90.04mm (+0.04mm Oversize)
Actual bore: 89.96mm
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.E
8811DE
Lock Part Number: CW21
Pin Part Number: WP074
Ring Set Part Number: 900ADS
Vehicle Fitments
Speedway (All Models)
GM Speedway 499cc