Cosworth Pistons are manufactured entirely in house in the UK. Produced from 4032 alloy, the Cosworth Duratec piston features a unique, light-weight skirt profile along with valve relief pockets. Kit includes four pistons with pins, pin clips and piston ring set.
Bore size: 87.5mmTop ring - 0.99mm. Suggested ring gap 0.30-0.36mm
Compression ratio: 11:1 (2.0), 12:1 (2.3) - using a 0.4mm thick head gasket.
Second ring - 1.18mm. Suggested ring gap 0.25-0.31mm
Oil control ring - 2.415mm. Suggested ring gap 0.20-0.70mm
Piston to bore clearance - measure the piston size at 19.64mm from bottom of the skirt. Recommended clearance is 0.074-0.114mm (0.003-0.0045").
Piston to valve clearance: due to the infinite combinations of valve, piston, head and gasket combinations, the piston to valve clearance must be checked and be at least 0.040".
- Additional Information
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