You need 8 pieces for one engine.
compare 11331261712
You need 4pc for one engine.
For R50/5, R60/5, R75/5, R60/6, R75/6, R90/6, R90S, R60/7, R75/7, R80/7, R100/7, R100S, R100RS, R100RT, R100CS, R80G/S, R80ST, R80RT, R80GS, R100GS, R100PD, R100R, R80Basic
1. oversize in 90,5 mm
2. Übermaß = 91,0 mm