Okay so I ran across some Efans for $50 bucks. Are they worth it. I hear some claims of 15-20 HP?? Is that realistic? Also will they produce enough to cool my engine? One more thing. Is it something that I could install myself?? How do you hook them up? Allen have a harness I could but or something?? come on guys let me know. I really need to start upgrading my truck!!!

Thank,
Daniel