[DEEZNUTS]

I have an after market stereo system (1400 rms amp, 2 12's) would I be able to install underdrive pulleys or would it drain to much. thanks

[fobra559]

Some have ran UD pulleys with their systems with out an issue. I would go with the Steeda set, they are made with real quality and fit nicely

[DEEZNUTS]

I would definitely go with the steeda, I was about to order them but seen threads talking about drains do to the slowing of the alternator.

[fobra559]

It's honestly up to you, it's a nice mod that frees up hp.

[1989gtfifty]

If your worried then keep you alternator pulley on and just change the rest

[DEEZNUTS]

Yea I was wondering if that was an option, that's probably what I'll do thanks.

[racin366]

Its dicey leaving the alternator pulley and changing the rest, it still won't run at stock speed bc the crank is underdriven. I have underdrive pulleys and 14 speakers in my car including 2 10' subs and have never had a problem, even idling for a long time with the tunes blasting.

[silverstang02]

the UD pulleys alternator pulley and water pump pulley are bigger then the stock ones to compensate for under driven crank response, it shouldn't effect the alternator