Just saw these on ebay and they are a great deal if anybody is looking. Not mine and just passing it along for anybody who might be thinking about a boost increase. If I'm reading it right, he has 4 sets of 3?????
http://cgi.ebay.com/ebaymotors/Blowe...mZ380073505555

Griff, what size did you use on your 525SC ? Also what is the boost level vs. the size of each pulley? Thanks Scott

I think those listed will be around 8#, 7.5#, and 6.25#.
Mine was in the 2.87 and ran just shy of 8#. Stock is 3.5".

Would I have to change the belt with these pulleys?

Maybe, I would not think so with largest one, but probably with the smaller ones. I always got my belts at Napa and they were about $40.

I bought the pulleys!