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I will be receiving my Troyer Performance under pulley for my 4.2. Does any one else have this part? What performance gains can I expect? Any problems?
I've been thinking about that mod as well. I've read that people are seeing some pretty decent power gains. I think I'm going to go with the electric fans first, though.
I have the electric fans and have seen a distinct difference in the acceleration. I was given a set of dual 11 inch fans. I mounted them to the existing fan shroud and love the results.