air fuel wideband guages

MidnightSwinger said
I’ve only used AEM, but no issues.

Ted265 said
I have the AEM, it checked out accurate against the dyno afr readings when i had the car there and it is still working fine 10 years later.

X2 for aem. I love mine. And the replacement O2 sensors are easy to find, and inexpensive. I was good for about every 2 years in race gas. Haven't changed one since I went e85. I like that they can read lambda, and have a spare face for it too.