New not rebuilt. 65 amp internally regulated alternator to fit CIH Opel engines with the use of an alternator, (NOT GENERATOR). The voltage regulator is built in. Includes a new ground wire and (D+) wire extension to connect to the original wiring harness for the warning light. We also suggest new alternator bushings pn 6049 and 2x 6047 for best installation results—NO CORE CHARGE. [ Q&A ] Q: Why use a 65 Amp alternator? A: It allows for modern electronic upgrades to be added to your Opel. Q: What advantage is having an internally regulated version? A: Cleaner installation and more reliable. Internally regulated alternators are the standard now. Q: What if I don’t have any electronic upgrades, will this alternator be too much? A: No, the alternator will only provide the number of Amps that the car requires. With a larger capacity alternator, the alternator will not be working as hard and should last longer as a result.