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Fits Cat 800 HO-SSI 950 topend for sale with 800 miles. Jason Priceless ported. Made good power. Two sets of pistons one pair like new with new ring set-two sets of domes- Exhaust valves. $1000.00. 52mm throttle body’s and Rad Valve reeds like new. $400.00 for the set. Mike Walters in Michigan. 231-590-9004