Air/Fuel meter recommendations??

I got the MTX-L, and at $200, it's nice. Guage and all, and it's standalone, so it's really easy to transfer from vehicle to vehicle.

Narrowband isn't worthless. It's great for monitoring once you get a ride tuned in. It's just no good for tuning. Get it dialed in with wideband, make sure it stays there with narrow band.