From Mugen:

The clutch is connected a bit faster than E2718 kit standard, but the clutch slips less at high rpm and load. The combination of three types of aluminum clutch shoe will be able to handle more tracks and road conditions.
#E2724 – Al. Clutch Shoe 1dot (4-Shoe)

The point where the clutch is connected is the same as E2718 kit standard, but the clutch will be connected in slightly slippery from bottom to the top. The combination of three types of aluminum clutch shoe will be able to handle more tracks and road conditions.
#E2725 – Al. Clutch Shoe 2dot (4-Shoe)
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