I'm pretty sure they are 2 1/16" but I wanted to make sure before I ended up with a couple that don't fit the stock location.

Thanks in advance for your help.

 

i believe they are 52mm

 

Thanks Mike. 52 mm is the same as 2 1/16". I only posted in inches because I am looking at a digital boost gauge that reads in PSI. As you know if it reads boost in PSI, the gauge itself is probably measured in inches.

In case you are wondering I am looking at the cyberdyne ultra digital gauges. I have debated over gauges for 6 months. I loved the greddy gauges (reads in bar) but then again my supra made 26 PSI opposed to 7-8 PSI (350Z) which is like .5 bar. I think for a small amount of boost the digital gauges are the way to go.

 

OK, I just PM'ed ACP who has the Defi BF series gauges in the stock console/pod location. He said the 60 mm (2 3/8") fit perfectly. I would think the 2 1/16" would be too small.

What gives? Please post pics of your gauges and sizes.