Spool Pads
There is two ways of creating a spool for this car
1) use the newer pulleys with the pads pre fitted A3325 (42t) or A3324 (41t) ( these are for the older car so a little dilling out is required)
2) to use the spool pads, These came out before the above. they are pads that look like sand paper and go inside the diff instead of the diff balls
hope this helps