been looking at the angecy power pulley, from what i've seen on the forum, it seems to be the best bang for the buck. but was wondering, i haf 2 alpine amps and 2 nakamichi subs in the back, if i change to the agency power pulley, would i lose amps to run these accessories? how would i be able to check if it would be sufficient? thanks

Two things.
1. If you underdrive the Alternator, you will lose current.
2, From all that I have read from SEARCHING on the forum, you would make your car faster by taking the stereo out then installing pullies.

been looking at the angecy power pulley, from what i've seen on the forum, it seems to be the best bang for the buck. but was wondering, i haf 2 alpine amps and 2 nakamichi subs in the back, if i change to the agency power pulley, would i lose amps to run these accessories? how would i be able to check if it would be sufficient? thanks

Add a volt meter to your ride. I upgraded my stereo system and added a prosport volt meter. It reads about 14.2 when the bass hits. I have (2) amps, (7) tweeters, (2) 8" subs, (2) 6x9's and (1) 10" sub....you should be fine.

Add a capacitor to your system and it should take care of the problem with an underdrive pulley