anybody using or have used this? saw it in the ol' jeg's catalog and wonder what kind of usefulness it would have. supposedly constantly monitors air/fuel ratio and corrects as necessary... so wondered if it really works as advertised, as in a constant proper ratio. kinda' pricey, $115 / $199. so for guys that make mods to their engine, seems like a pretty handy gadget to ensure the proper ratio and take some of the guess work out of it? holley p/n's 510-534-27 (non digital sensor) and 510-534-54 (digital sensor)

KAM

 

Those are optional parts for the Holley EFI setups. They aren't stand-alone WB O2 kits. You'd be hard pressed to find a commercial WB 02 for less than $350.