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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 90.02mm 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