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Carpenter Racing Valve Springs are 60psi on the seat and can handle the largest cams available for the Kawasaki ZX10R. Designed for use with the stock retainers.
Posted by Pierre wever on 24th May 2020
Had these in my bike i am replacing them for new one vety good Had these in my bike before i am replacing them
Posted by DA on 27th Mar 2016
These are the best Springs on the market...
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