LT1 Goodies! Performance/Stock
Re: LT1 Goodies! Performance/Stock
They are a positive stop valve seal. The stem has to be cut down. They were recommended to go with my cam. I'm not sure what "umbrella" means. They are part number 503-16
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1LEThumper
Forced Induction
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Jul 14, 2003 12:45 PM



