The rear brakes also have 13-inch rotors and four-piston calipers, plus a parking brake. SSBC makes bolt-on kits for many popular applications; the Buick was not one of those, but we easily adapted existing parts to make it work. You can also see some of the stainless exhaust from Kanter. Sharp-eyed readers will see we are not using the stock muffler, which was originally located between the axle and gas tank. That's where we put the fuel pump and filters.