Off Road High Output alternators using stock diameter pulleys and come standard with our internal voltage regulator for constant voltage.  Every AutoTech Engineering unit is assembled 100% in Riverside, California. With over 100 years of combined, “on hands” experience and the fact that we have been in business for over 28 years has allowed us to source and supply the highest quality component parts to ensure your unit exceeds expectations. All are plug and play unless over wise stated. Some modifications such as adding spacers or plug harness are included at no extra cost.