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BillK · 08-08-2012, 07:21 AM

Grant,
The Pioneer OS450's I have measure about .720" so they should be ok. Another possibility I thought about this morning is the plastic umbrellas that were used on some of the mid to late 80's 350's that had 3/8" exhaust valve stems. Not sure of the size on those. They are a hard plastic and would not move around as much. Fel Pro number is SS72525 for 8.

08-08-2012, 07:21 AM	#2
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 230 Likes: 12 Liked 30 Times in 17 Posts	Re: BB Chev valve stem seal question.... Grant, The Pioneer OS450's I have measure about .720" so they should be ok. Another possibility I thought about this morning is the plastic umbrellas that were used on some of the mid to late 80's 350's that had 3/8" exhaust valve stems. Not sure of the size on those. They are a hard plastic and would not move around as much. Fel Pro number is SS72525 for 8. __________________ Bill Koustenis