Top quality from Hepolite! This current UK production valve spring set suits all unit Triumph 650 & 750 4 valve heads & many pre-unit 500 & 650 twins. Includes 4 each inner & outer springs, enough to fit 4 valves. Replaces Triumph part numbers 99-7037 70-4221 70-7400 70-4222 E4221 E7400 E4222
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