proflow valve stem seals, oem hat type, intake and exhaust, suit ls1/ls2/ls3, 0.500" guide, 8mm stem, set of 16

Our OEM style top hat LS valve stem seals are designed for stock powdered metal and bronze guides. Suit single beehive springs.

• 8mm Stem


• 0.500" OD Guide (LS1)


• 1.200" OD Base


• 0.790" ID Base