264°/258° performance cams for mildly modified NA Toyota 1UZ-3UZ VVTi engines with basic intake and exhaust upgrades. Good upgrade for street cars to improve mid-range power. Still maintains good drivability. Retains full use of VVTi system. Designed to work with stock head casting. Requires upgraded valve springs. Kelford Cams recommend KVS1UZ valve spring.