My vehicle just hit 15,000 miles and since my rotors are "warped" in the front really bad I decided to replace the brake pads while I also do the rotors. I noticed online that you can buy a brake shim kit (6510450AA). Do I need this when replacing my brake pads? I bought some EBC greenstuff 7000 series for the front and EBC 6000 series for the rear. From reading online it sounds like they will brake harder than stock, but produce more dust.