This Delco Integral Voltage Regulator is a new aftermarket product that fits perfectly as a direct replacement for your original regulator. It is compatible with Delco 10SI, 12SI, 15SI, and 27SI alternators with a voltage set point of 14.8. The part number for this regulator is VR148 and it also has interchange part numbers of 35-101-1 and 8040-6241. This voltage regulator is designed to help maintain a proper charging system for your vehicle. It is a great addition to your car or truck's electrical system and will keep your battery charged and ready to go. Don't miss out on this opportunity to upgrade your alternator's voltage regulator with this high-quality Delco Integral Voltage Regulator.