Nathan at excessive amperage hooked me up with a 300 amp alt for my trailblazer for $505.00 shipped. I think all of his alts put out their max power over 2,000 rpm but I told him I never drive mine over that so his is modding it to do about 165 at idle which is normal but it will put out full power at 1,500 rpm. I just wanted to share the great customer service.