i didnt think about that. im a fanthe mileage isn't high for an LS/T56 car.
and based on the modifications to the car already, the price is very justified (the gen4 rear end, the custom hurst short shifter, the motor mounts, etc.). those are all things i would have had to do myself.
Need to lower it more Bio, c'mon you're slacking.
front: 20x9 +35mm (245/35R20)
rear: 20x10.5 +42mm (275/30R20)
The wheels are 19x9" +40mm front (semi-concave) and 19x10 +42mm back (deep concave). Forgestar guarantees that they will fit any stock CTS-V. Using the 1010tires offset tool, I calculate that the front wheels will have 4mm less inner clearance versus OEM and extend an extra 8mm on the outside. The back wheels will extend in both directions by an additional 19mm.
What wheels are you going with? I got the f14's for my car a couple weeks ago. You'll most likely need trailing arms if going 10.5" with the same offset, my rears(19x10) fit but are close.