Man, if I was not getting the knock controller display with A/F built into it I would so get this A/F guage.

http://www.nordskogperformance.net/d70140.html



• 2 5/8" diameter
• Will work with your stock oxygen sensor or purchase sensor S8942 separately.
• 270 degree, full sweep, stepper motor movement.
• Industrial servo technology and buffer circuit for steady readings in all conditions.
• Accurately displays 14.7: 1 Stoichiometric Air: Fuel Ratio.
• Broad range of reference numbers for easy accurate tuning.
• Programmable output for "lean" condition warning. Must purchase R1000 output relay kit for use above 2 amps.
• Recalls richest reading achieved.
• LED through-dial lighting for excellent nighttime visibility and great looks.
• Available in Black, White or Silver face with Black, White or Silver bezel. Not available in Black face with Black bezel or White face with White bezel.
• $129.99

 

It looks like you'll need to purchase the sensor with that gauge. Yes, you need a wideband for accurate results on FI.

 

im thinking of getting this one, for a little more than a stupid autometer, it reads pretty good, even though i can already tell mine will be pegged on the 12:1 most of the time in boost, since it will definately be lower than that, but at least ill feel safer knowing its not leaning out at all for now. a good temporary investment until i save up for an FJO