Supertech double valve springs
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Cpt. Slow
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Supertech double valve springs
I've got a set of doubles on the work bench, with no idea if they're heavy or light doubles. I've got an email out to Supertech, but before I wait a month for them to respond, does anyone know how to measure a difference between the two? Is it the seat spacer? inner spring coil thickness? spring height? Any insight would be greatly appreciated.
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