Hi birddog, the Kitfox has the standard wing, yes the intakes were modified to fit the tight space between the engine and firewall as the up intakes & carbs would not fit in the cowl. I did not do the mod on the intake tubes the folks I bought the engine and engine mount from did. There are several guys with the HKS in the Avid and I know one fellow modified his cowl with small bumps on the top for the carbs and it looks good on his plane I really don't know what kind of speeds they are getting but I believe it better than I'm getting but I think the Avid was a bit faster than the early Kitfox's.