Manufacturer BMW

Kit Part Number K1688

Engine Code M20/B23

YOM From 1978

YOM To 1986

Piston number K1688D050

Bore Size 80.5mm – K1688D050

Stroke 76.8mm

Compression Height 38mm

OEM Comp Ratio 9.5:1

Number of Rings 3

OEM Rod Length 130mm

Clip Part Number CW22

Pin Size 22mm

Pin Part Number WP017-SP

Cylinders 6

Valves Per Cylinder 4

Wössner is the innovative specialists for high performance pistons and conrods. Wössner products are to be found in engines operating at the highest levels of motor sport, in competition and, of course, in everyday use – in fact, anywhere where longevity

and operational noise are important factors.

Wössner products are the source of the superior power behind the success of well known motor sport teams at national and international race meets.