has anybody found or installed underdrive pulleys on their 04 or 05 5.4L3v?i cant find any everthing i find goes up to 03.really i dont understand why underdrive pulleys from 97-03 wouldnt work on 04 & 05.i think this is where i'm going to start on my 05 fx4 scab4x4.thanx in advance

 

****** Performance $188.95 part#527374. Adds 14 h.p. Get the Goodyear Gatorback 102" belt $35.00 part#4061020
Let me know how it works for you because I am thinking about doing it also.
Good luck

 

email me and I will give you the link.

 

Can I ask why? They belong on mustangs, not trucks. Proper cooling and charging are critical on these rigs.

 

i used underdrive pulleys on my 97 5.4L scab4x4 had no cooling or charging problems.sure if you run way to small of pulleys you can have sever charging problems...

 

i found out that the dealership has them $256 installed i think i might do that but i might look at your 1st to compare notes.i think fords only frees up 8hp