Replacement one piece crank pulley / harmonic balancer for A+engines, but can be used on pre-A+ large bore engines as well. If you drive your Mini hard, the crank damper may slip, causing vibration, improper timing, noises, and even internal damage. If you can see deep cracking, or suspect it is slipping- replace it immediately!
 
Not for MPI with serpentine belt. Does not come with timing marks.