Flex0

Hey guys I recently found out that I have to change out my clutch shoes because my car is in a constant idle. So I purchased the Ofna Med. shoes with springs, my question is why does the kit come with 2 different color springs (my guess is different tension) and shims or washers and where do the washers go? I reffered to the manual and the stock setup doesnt require washers or shims. What should I do, any help would be cool.

Thanks