yeah i've heard a lot of bad things on the surface, but then if you actually ASK PEOPLE WHO OWN THEM, they tell you none of the issues are true, at least not all of them. the ONLY problem i heard was don't run lots of electronics (i.e. subs and amps and a/c) while you are in idle because you are running less power in your alternator. for me, that's not an issue, i rarely use my a/c and i have no system, cept for the sony speakers i replaced over the stock.
so i guess, since that's been covered. let me ask..
AEM vs. UR?
aem does NOT have an crank while UR does.
why and what's the ups and downs?
so far, it seems fairly even, but c'mon UR is BASICALLY charing 150 more for ONE more pulley.