Upgrade or convert your Delco alternator with this STS Parts 1-Wire Self-Exciting Voltage Regulator Kit. Designed for Chevy GM IR/EF alternators including 10SI, 12SI, 15SI, 17SI, and 27SI models, this rebuild kit eliminates the need for external voltage sensing or ignition wires. With a 14.8V setpoint and very low cut-in speed, this regulator allows your alternator to begin charging earlier during engine startup—making it an excellent upgrade for vintage vehicles, off-road rigs, or simplified wiring setups. 🔧 Kit Includes: 1 × Self-Exciting Voltage Regulator 1 × Brush Set 1 × Rubber Port Plug Whether you're doing a rebuild or need a simplified charging solution, this high-quality Transpo-style regulator is the one to get. 🔄 Replaces/Compatible With: Delco Remy IR/EF Alternators GM 10SI, 12SI, 15SI, 17SI, 27SI Type 100 & 205 Series Internally Regulated Alternators