You atleast need to replace the "friction plates." Also the steel plates if they have turned blue. You might want to go with heavy-duty springs (springs are usually pretty cheap). Be careful if they quoted you a kit from Veshra...My dealer quoted me $162 for a complete Veshra kit, which was supposed to include all of the above items. When it came in it was friction plates only, for the same price. The dealer said it was Veshra's fault, since they list it as the kit, but it's not. Told me it would be an additional $90 for the steel plates & springs. I thought that was crazy, and didn't buy it. Let me know if you find a good deal.
AL