When I did my rear brakes, I removed the entire caliper from the disc and after removing the bolt I was able to open the caliper and remove the pads. I only recall removing the single bolt.
Look at the pics in this thread, and it should make more sense...
Vibrant exhaust and a SS AFC, save the rest for some sort of upgraded intercooler.
Don't waste your money on CAI, it just makes noise.
Or, buy some light weight wheels.
My car is doing the same thing. I was told that since the pads are low the calipers are extending to far and may not be retracting all the way? Not sure, but Im going to replace the pads and rotors soon, and will provide an update.