Has anyone run into issues with the stock predator tunes such as the cars running to lean with or without the pulley????? I live in Minneapolis and run 92 or 93 gas. On one of the other boards someone claimed that MANY people were having engine knocking with the canned tunes in the predator. Right now I have a cat back, CAI, and the predator performance tune but waiting to drive it once the roads clear up as I did the mods over the winter. I want to add the pully but I'm cautious. I'm trying to get the opinions from the board as it seems like the members have better knowledge than Steeda where I purchased it from.