Our 1955-57 Pontiac Fullsize Car, Front Stock Spindle Disc Brake Conversion Kit uses Lg. GM calipers for more friction surface area and improved stopping power. Our exclusive kit comes standard with GM 5 X 4.75" bolt pattern 11" rotors. These kits mount to your original spindle making installation a snap! May not work with 14" wheels. We recommend 15" wheels. Kit includes: • 11" High Quality Finished Standard Rotors • Lg. GM Calipers w/brake pads • Mounting Brackets • Bearings • Seals • Dust caps • Spindle nuts • Rubber Brake Hoses • All necessary hardware • Limited Lifetime Warranty Upgraded rotors shown