THIS IS A NEW ALTERNATOR WITH ALL NEW PARTS. IT HAS A 100 AMP OUTPUT AND IS BRIGHT AND SHINEY CHROME FOR YOUR SHOW CAR, STREET ROD OR PROJECT CAR. IT'S THE INTERNAL REGULATED GM 1 WIRE ALTERNATOR, BUT FEATURES A RUBBER PLUG THAT MAY BE REMOVED TO MAKE A 3 WIRE HOOK UP JUST AS THE CAR CAME FROM THE FACTORY WITH. ONLY 1 WIRE IS NESSESARY TO WORK BUT IF YOU HAVE THAT EXTRA PLUG IN YOUR CAR'S HARNESS NOW YOU'LL HAVE A FUNCTIONAL PLACE TO PUT IT! LOOKS GREAT ON ANY GM VEHICLE, AND IF YOU HAVE A CHEVY, CHECK OUT OUR HIGH TECH ALTERNATOR BRACKETS THAT HAVE HOLES IN THEM TO HELP SHOW THAT CHROME ALTERNATOR EVEN MORE!