Replacement gauges

So I''m looking for some replacement gauges for my 3k and i wanted to just replace the three that are currently in the center of the dash because ive read the "boost" gauge doesnt actually measure boost and figured if i''m going to replace one i may as well do all 3.  My question is: what is the size of the gauge housing?  I''m looking at some megan racing gauges and they are 52mm...will they fit as far as diameter and mounting depth?  Thanks

I replaced my gauges with prosport performance gauges. Google prosport performance I forget the web site.  they gear towards 3000gt stuff.  they even show you how to install.