Direct GM Replacement Fitment: Designed as a hard-to-find replacement front brake rotor for 1969-1972 GM midsize applications using factory-style disc brake spindles., Vented Cast Iron Construction: Premium 11-inch vented cast iron rotor helps dissipate heat for more consistent braking performance and reduced fade in demanding conditions., Correct 5 on 4-3/4 Bolt Pattern: OEM-spec 5 x 4.75-inch wheel bolt circle accepts popular GM muscle car and street machine wheel options., Installed Wheel Studs & Races: Includes pre-installed 7/16-20 fine-thread wheel studs and bearing races to simplify service and cut down on installation time., Ideal for Restorations & Upgrades: Excellent choice for restoring stock front disc brakes or completing a drum-to-disc conversion on compatible GM midsize plat.