Ford Focus MK2 ST225 RS RS500 5 cyl 9.0:1 83.5mm Wiseco Forged Piston Kit WKE227M835 Engine_N20 there are improvements with throttle

there are improvements with throttle response and an increase in torque

Exhaust Mounts EXH004

Closed loop Dual Lambda Control

Front Anti Roll Bar Bush - 24mm Please measure anti roll bar diameter before ordering

springs and/or ported to your requirements

Ford Focus MK2 ST225 RS RS500 5 cyl 9.0:1 83.5mm Wiseco Forged Piston Kit WKE227M835 Engine_N20 there are improvements with throttleFord Focus MK2 ST225 RS RS500 5 cyl 9. 0: 1 83. 5mm Wiseco Forged Piston Kit WKE227M835 You are buying 5 X Forged Pistons, Rings & Gudgeon Pins Product specifications Attribute Value Bore Actual 83. 50 mm Bore Oversize 0. 50 mm Compression Height 30. 50 mm Compression Ratio Actual 8. 5: 1 Country of Origin USA Deck Clearance 0. 10 mm Dome Volume 11. 5 cc Material Type 2618 Piston Pin Diameter 23. 00 mm Ring Set Included 8350XX Weight Nominal 340 g 7