Wiseco Forged Pistons ST225


SKU: N/A Category: Tag: Product ID: 7708


  • Coated on the sides from the factory
  • Valve Pocket design allows max flow around the valve, also allowing oversized valves and high lift cams to be utilized.
  • Piston crown shapes designed to promote max intake charge efficiency through scavenging mixture ‘Cross Flow” during intake and exhaust valve overlap. More fuel and air equals more horsepower.
  • Pistons designed to optimize squish or quench during compression/combustion cycle events, resulting in resistance to detonation and pre-ignition. The end product is longer engine life and increased horsepower potential.
  • Complex Piston skirt profile that reduces power robbing friction, yet promoting stability in the bore for optimum ring seal.
  • Precision machined ring grooves with proper orifice/accumulator volume using calculated groove root diameters and axial widths, featuring excellent surface finish and flatness providing maximum ring seal and minimizes blow-by and oil consumption.

Wiseco 83mm Piston Set for Ford Focus ST225/RS and Volvo S60R.

Complete set of 5 pistons, includes all required pins, clips, etc.

83.5mm also available, please specify when ordering.
The Wiseco piston is only available with a 23mm pin size for both st225 and the FRS mk2
The st225 has a pin size of 21mm so you will need to buy suitable rods to use Wiseco pistons

Quality, integrity, and service are the backbones of Wiseco’s success. No other piston manufacturer can match Wiseco’s advanced technology and care for detail. That’s why the top engine builders and racers in every PowerSports industry have come to appreciate and depend on Wiseco for consistent winning results.

Additional information

Weight 3 kg
Compression Ratio

8.5:1 (Add R1,537.55), 9.0:1

Bore Size

+0.5mm (Add R876.30), +1mm (Add R876.30), Std Bore


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