GM 12728729 Gen 5 LT1 Single Beehive Valve Spring Set
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Product Description GM 12728729 Gen 5 LT1 single beehive valve spring replacement set. This valve spring set is a performance replacement for stock Gen 5 LT1 valve springs, commonly used as an “upgrade” spring for the L83 5.3 engines. These spring set uses your stock factory seats, seals, retainers and locks.
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