Milt, I sure can't argue one way or the other (and wouldn't anyhoo
) as I've never tried either plug.
My only experience is with the unknown plug I've been running in my old FA-40, which looks to be a Fox 4-S plug.
But some flyers say they're completely happy with the factory Saito plug so, if that's the Hangar 9 plug as claimed, there are a lot more runs available for comparison than those 35.
And, hey, a $'s a $, right? - but I also saw a 5-pack for $25 on the 'bay.
Terry