I've had Exedy Stage 1 Clutch kits installed in my cars and eventually the same things happens to them....The clutch springs break themselves loose from the clutch disc. Cracks appear where each spring is housed.

I was looking to replace it with a clutch that has a 6 spring, more spread out spring set up, as opposed to the exedy 4 spring. Any recommendations?

Also, anyone have any opinions on XTD, NKK, XTR, or F1 clutch kits? They look very similar to other name brand companies, which is why I wonder if anyone has had any experience with them?