HP500EFI Valve spring question
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HP500EFI Valve spring question
I am going to replace the springs this week and would like some input. What is the best brand to use?? Do you have a part number and price? I assume that this can be done wthout removing the heads. Is it possible to see a performance gain? The motors have about 200 hours and see some generous doses of throttle. Anything else you would recommend at this time??