In order to keep the larger 1986+ calipers when doing a solid axle swap on a Pickup/4Runner you need a set of FJ 60 Land Cruiser vented rotors. These rotors also fit 1981-85 Toyota Pickup/4Runner solid front axles when using 86 to 95 IFS style calipers. Simple bolt-on installation. Once rotors are installed, 1986-1995 IFS style front calipers bolt right onto the 1982-1985 solid axle knuckle. The standard rotors found on 79 to 85 axles is a solid rotor known to warp when used with large tires due to their inability to dissapate heat. The vented rotors allow vastly increased cooling, increasing the brake performance and life. Sold individually.