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PEC

BMW 1100 RS / 1150 RS 4 Stroke Wossner Forged Piston Kit

Wössner are regarded by Europe’s leading motor sport engine builders as being the piston of choice when building an engine not only to perform, but to withstand the stresses and duress’s of competition life. Wössner pistons feature a unique PTFE coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances. The crowns of the pistons are also polished to better resist detonation on a high performance engine. Polishing allows a more even spread of heat inside the chamber which will help prevent “hot spots” on piston crowns. Price includes all piston rings and gudgeon pins.

Specifiction

Technical information is sourced from Wossner's latest catalogue

Part Number K8543
Engine Type

1100 RS, GS, S - 1085cc

1150 RS, GS, S

OE Bore Size 98.96mm
Bore Sizes Available

98.96mm - 1085cc

100.96mm - 1129cc

Stroke 70.5mm
Wossner Comp. Ratio -
OEM Comp. Ratio 10.7:1
Dome/Bowl Volume +2.3cc
Comp. Height 32.10mm

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