Sorry if this information has already been posted, but I didn't find it while I was searching and thought I would save others the time I spent looking. This is information on how to do a 12" brake upgrade to your GP for cheap.
I just finished doing a 12" brake upgrade on my 02 GTP and it didn't cost much more than doing a regular brake job. I went to rockauto.com and used their parts search catalog. Look up an 02 Monte Carlo SS and add two front brake caliper brackets to your cart @ $17.65 each. Pick out two 11.9" front rotors (choice is yours about which ones to get) and add to cart. These are the only parts that are not the same as your GP. The pads and calipers are stock parts. The new caliper brackets come with the grease for the guide pins, but do not have the clips that hold the pads, the rubber boots or the rubber sleeves for the guide pins. I went to Autozone and got the front brake hardware kit #H5913 for $9.99. This included the 4 guide pin sleeves, the 4 rubber dust boots and the 4 clips for the edges of the pads. You can remove these parts from your old brackets, but I don't think it's worth the hassle for $9.99.
Now that you have all the parts you need, start by getting the brackets ready. Put a little grease in the holes to make the guide pin sleeves go in easier. Push one sleeve into each hole all the way to the bottom. Now press a boot into each hole. This was the most difficult part of the whole job. I used a washer that fit over the boot, but hit against the outside edge of the boot where it is metal. With the washer in place, I took a socket that fit over the boot and used a rubber mallet to smack the socket against the washer and drive the boot into the caliper bracket. Squirt the rest of the grease into the boots and they are ready to go on.
Do a brake job the same way you normally would, but use the 12" rotors when you put it back together and replace the old caliper bracket with your new ones.
Originally Posted by colindunn
