A/F/R gauge for tuning

AEM I like it to get me in the ball park. Being that my engines can vary from stock-ish to pretty modified, each engine likes a little something different. Once you get a base line in on what’s said to be the perfect A/F for driving and W.O.T., you can adjust it quick and easy for best results on mileage and/or strip E.T.

I tried the Inovative dual 02, junk! Just junk. Waste of money.