Manufactured by McGaughys - Part Number | MCG:63154 | 1971-72 C-10,13 Inch Front Disc Kit W/2.5 Inch Spindles - Cross Drilled (5 On 4.75 Inch) (Must Use 17 Inch+ Rims), , McGaughys started off manufacturing suspension parts for classic Chevy cars but over the years they have evolved into a full line suspension manufacturer including Lowering Suspension, Lift Kits as well as Classic Car Suspension parts. Product information updated on 2022-04-14