Just want to put some information out there that is a little easier to find for whoever wants to install an under drive pulley:

I purchased my SLP Pulley from
LMPerformance.com for 179.95 shipped.

Main drive belt is 25% underdriven and utilizes a 6 rib belt at 79.5"
P/N: from advance auto --- 5060795 Dayco 795K6 drive right

A/C accessory drive isnt 25% underdriven due to the timing cover. I'm not sure of the percentage but 378K4 belt worked for me. This is a 4 rib belt at 37.8"

 

what type of gains are you to get from the pulley?

 

i think advertised gains were 10-12 at the wheels. I can feel a slight difference, but i also descreened my MAF, cleaned my K&N and removed some obstacles for airflow into the airbox.

 

good info!

 

very good info.

 

With all the elcetronics the V has id be very concerned underdriving the system with one that much. Id go with the 10% personally.

 

alternator still puts out 14.5V at idle. What other electrical problems could there be besides alternator not putting out enough to charge the battery for starting? That was my only concern. When your driving the car around town, you have nothing to worry about as long as your turning the alternator enough to have an output.