Accel's popular electro mechanical voltage regulators are factory set at exact OEM specifications and feature heavy-duty shock mounted bases, vibration proof internal wire connections, OEM style covers, fiber and mylar insulating pads and large diameter contact surfaces. Fits 12 Volt FL/FLH 1965 thru 1969 and 1965 thru 1978 XLH (OEM 74510-64).