TUFF STUFF 7127D High Output Alternator for GM Vehicles - 1-Wire V-Groove Design - Perfect for Off-Roading, Hot Rods & Performance Upgrades

Great ALT! High Quality! I was having trouble with battery charging at idle in the winter with all accessories going. With this alt it makes enough at idle to keep all accessories on and still charge battery, and once off idle it makes 100 amps. Directly replaced my original, and it can run in 1 wire or 3 wire modes.