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Leak down test showed very low compression in one cylinder. Removed it and took it to a shop today. Burned exhaust valve. Valve guides fine, oddly enough.

So I want to order new valves today, but I have no idea what to order for the AeroVee heads. Can anyone help with a part number or description of the correct valves to order? I'm just going to order a full set and have both heads done while I'm at it. THANKS!

The Sonex web site says 35.5 and 40mm, with single grooves. The ones I'm finding online have 3 grooves. Does that make a difference or is that just for vertical adjustment options?

When I got a valve job done locally they said that I needed to supply the correct single groove valves. I called Sonex and had them in a couple of days.

I think these are the same:

http://www.cbperformance.com/ProductDet ... tCode=1529

http://www.cbperformance.com/ProductDet ... tCode=1531

Yep. Ordered from CB Performance today. Normally I have no problem ordering from Sonex, even at the higher price. But I'm in a time crunch and needed to get them ordered today, and then to get fast shipping.