Are underdrive pulley system worth it. The truck has factory stereo system.

 

I read somewhere and they said no. Ford allready equips their engines with an aggresive pulley arrangement that there is little to no gain. SVTperformance.com

 

I did them. Save your $$$ for something else. Just a fudge quicker off the line, that's it. Not worth it.

 

Yeah the suck i wouldn't do them again, same with e-(worryaboutallthe time)fans

 

xlint is completely right. I did them myself as well, near no improvement in the 0-60 except off the line. Anthony, you posted right as I did. I agree about the e-fans as well. I overheated the other day in Union city traffic...truck was smoking, coolant was boiling...won't do efans again.