I would like to measure it for you, but its 3000+ miles away from me right now

liar, its more like 2465 miles but who's looking. : )

ha ha ha ha ha:ohsnap:

Detroit Speed Cars
 

Please note that you cannot compare wheel/tire setup on a car with DSE front subframe with a car with stock subframe! Reason is DSE subframe is designed to allow sharper turning radius by moving frame rails inboard. Splined sway bar is also designed to allow sharper turning radius. Result is ability to move wheels inboard for more clearance between fender lip and outside of the tire.
Conrad

Conrad,
Clearly dse is a in a different class of suspension upgrades but the point is they gave themselves more than an 1.5 " clearance to the fender when they designed their subframe. If you want a no compromise setup to fit a 275 tire ridetech is not quite that.

Im running oem c5 zo6 brakes

Heck, I could have saved myself some measuring and head-scratching if I would have thrown $4k more at my Firebird and just bought a DSE subframe!:)

Whaaaatttt? You think it's the first time someone spent that much money just to go up a size. QQ

4000 more and you only get the front suspension:lostmarbles: there BASE Camaro frame is $7000 bucks.....now that's just the front boys and girls.....Ridetechs top of the line 1st gen camaro suspension setup the - Level 3 is $7050 for just fifty bucks more and you get EVERYTHING, front to rear, upper and lower control arms, tru-turn steering with tall spindles, 1000lbs per inch front swaybar, rear triangulated four link and kick ass triple adjust coil over shocks.......that's easy math...with the extra coin saved you can order those forgelines with the proper offset and good Baer brakes and get done

So I called Baer and their brakes do not offset the wheel mounting surface to their knowledge. The wilwood kit I have adds .38 inches of offset per side. So with that being said my wheels at 18x9 5.25 backspace should actually sit .12 further inside than the 18x10 5.75 backspace ride tech recommends. I have to get all my panel alignment perfect in the front but its going to be really close. Far closer than the picture of the blue car above.

All that being said it would be extremely helpful if RideTech provided better information on what fits and doest fit or even to take into account the brake offsets when ordering your wheels.

Once I get all this figured out I still dont know for sure my oil pan and headers are going to fit with the tru turn.