are underdrive pulleys worth the time and money? and if they are, who makes good quality pulleys for a 2001 silv 4.8?

 

I think they are worthwhile, if you can find them used. New they are like $250! I got mine used on here for $180 shipped.

 

the only one that makes them is ASP!!

 

Got Some Asp Pullyes Underdrive And Alt. Volts Droped To About 12v As Soon As It Revs Its Normal. I Dont Run A Big *** Stereo So I Dont Worry. Engine Felt Lighter Better Throttle Response. Major Gains No. Less Work On The Engine Yes.

 

So if i were to have a stereo system that needs alot of juice to keep it goin then underdrive pulleys wouldnt be what i want?

 

Just run the crank pulley, it will be fine..

 

Get the overdrive pulley for the alt. It's smaller so in return it'll spin it faster. This is what I have and I'm pushing about 800 to 1000watts. No probs here.

 

My brother installed the ASP UD pulley on his 99' GMC. Gave the truck better throttle response. I think its worth it.

 

So Im Pushin A About 1500 Watts And Still Want To Add Performance With Pulleys. So What Exactly Should I Do? People Keep Sending Me Pms About This So Let Me Know Exactly What I Should Do Thanks!!!!

 

I think there is better mods for the money