http://www.caraudio.com/forums/gpcaraudio-com/616499-team-gp-alternators.html
Have you talked to him yet?
He quoted me for a 300amp that was a little cheaper than singer and does waaay more amps at idle and mech only has a 370amp for my car but the Team GP still does more than the mech at idle.
And from looking up online the GP's usually do more than what there rated at so its probably kore like a 320-330amp that i will get
I cant speak on either of the three companys quality, performance, or service as ive never delt with them but i think mechman alts are over priced imo its more buying a name, singer is a great guy when i was trying to find one a couple months ago and emailed him he helped me out with what i would need to measure to see what i could fit i was gonna get his but id rather save some money and get better amps at idle.