Re: Good 5.25" comps
I have an 01 GTP. Depth is part of the issue. I had MDF rings that stuck out 1/2 inch and fit depth wise. The main issue after that is the door panel. Especially on the coupes where that plastic angled speaker grill is located in the bottom of the door. The top is so thick that it rubs on top of the speaker when mounted in the door. I took my Dremel and shaved of most of the plastic and the top two tabs the where the speaker cover mount in.
2009 Pontiac G8 GT, New Era Intake, Doug Thorley Exhaust, Patrick G Tune
Building: Hybrid Imagine 6.5 front, Image Dynamics CTX 5.25 rear doors. Peerless SLS 8's rear deck off of Kicker ZXSum8 and ZX 700.5
2007 Toyota 4Runner
Eclipse XA100 sub amp and Incriminator 187 10 in 1.6 cubes
Working on Double Din, nice 6.5 Seperates and 6.5 coaxs rear
Refs: Pike110,Hintzyboy,dcmcki, qcsfinest704, MagickMan, allstar1500bd, ravemeister, Team PSI, Jntar, Brian Owens, and others....so many