I am putting my heads together and ORiellys had these on the shelf (#3)thanks for the image...are you guys down with these seals.I had the #1's but would have to order those from Summit.Thanks engine is a low deck.Seemed to sweet to have those in stock

Check the fit on the guide first. If your guides have smooth sides as opposed to the grooved sides, then that seal may not grip it well, and may work it's way up onto stem to free float. Not good. What heads?

Irons stockers with over size valves,I dont have the knurled surface.I think i'll take them back and order the #1's.Those were what was on my engine and all were still on the guides..thanks man!!!

If you are running 3/8" valves that are .015" oversize DO NOT use these seals

Do yourself a favor and get the right seal!!!
Teflon seals are too tight initially especially with .015" oversize valve and can cause accelerated guide wear.

I offer Viton positive style valve seals in MANY, Many sizes. PM me for more info.