SP111P / SP114P

SP211P / SP214P / SP218P：

SP311P / SP314P / SP318P / SP321P：

SP214IL / SP314IL / SP318IL：

Such as SP314P1XX:
SP means type of clutch
3 means the number of clutch plate
11 means clutch size, the diameter in inches
P means standard, SP means special
1 means SAE housing