Tell me about underdrive pulleys. Power gains? Loss of alternator output? Lights going dim? Overloads with trailer lights? Loss of heater output to cab? Engine over heating problems? Is the A/C underpowered? Is a smaller drive belt needed? How many pully choices are out there?

Thanks in Advance, TIA

I'ld do a search, want to do a search, but it's still not working.

 

Aw come on. Some one has had to have done this to get a little more HP????

Sure with the search function was working.