M1 Performance Forged Piston Kit (+2mm bore) for BMW S1000RR K67 2020+
Part Number: M1-K678214-5-01
Introducing the M1 Performance Forged Piston Kit (+2mm bore) for BMW S1000RR K67 2020 onwards. This forged piston kit is designed for either a BMW OEM connecting rod or our M1 H-Beam Forged Connecting Rod Kit (available soon), and the stock stroke crankshaft. M1 is constantly leading the way in research and development for the BMW S1000 RR and M1000 RR engines.
Our M1 Performance Forged Piston Kit (+2mm bore) includes (4) forged high compression pistons, (4) performance ring sets, (4) heavy duty piston wrist pins, and (8) heavy duty piston locks.
Compression is increased from stock to (+1 point) 14.5:1 with the thickest OEM BMW 1.12mm head gasket which leaves the possibility to increase compression by using a thinner than stock gasket.
NOTE: Please consult a professional BMW technician that can calculate final piston to valve and piston to head clearances when using a thinner head gasket as well as use a degree wheel to check cam phasing.