I am looking for info on how to search part numbers comparisons, 2011 both cars one Vin v6 car one V series v8. Big brakes are my quest on the v6 coupe, need to know what parts are the same, and which are different.
Front
1. Spindles 2011 CTS Coupe
2. Backing Plates V CTS coupe
3. Brake ABS sensors
4. Master cyl
5.

I know I will need bigger rotors for the front however I understand the rears are the same part number, so calipers from the V series may bolt right on.
Rear
1. Spindles
2. Backing plates
3. Parking brake cables

Any help on where and how to search to make the comparison so I can determine what else I need beyond the calipers, pads, pins, hoses.