Underdrive pullies

[95riosnake]

I have a 95 Cobra and was thinking about adding a set of underdrive pullies. Now I know this question has probably been asked before but do the underdrive pullies really have any big disadvantages? I heard they decrease the speed of the accessories, which worries me because I have an amp and subs installed. Any help is appreciated.

 

[travis0712]

You should be okay, the slow down isn't that much unless you have several large amps.. some folks with boom stangs need 2 batteries

 

[Alex Swinney]

I don't know..I installed steeda's and I can definately notice the dimness of my headlights when at idle compared to >1k...The interior lights are also much dimmer...