From what I gathered from my search ,billet flow 2.93 or 2.76 upper and there snub idler kit. If you could swing the cash get all 4 billet flow idlers, don't forget you need a tune also , I'm also in the same boat as you looking for the right parts combo so if anyone can correct me feel free , I'm a newb , I also can't decide between the 2.76 or the 2.93 ....
I'm in the same boat right now. I have the stock pulley and wanting to upgrade. I'm also debating the 2.76 or the 2.93. While searching I keep running into people saying 2.93 is a good pulley to have if you are planning on changing the lower pulley and planning on getting a port. If you are only wanting to upgrage the upper pulley, go with the 2.76. But then again, I read that the 2.76 experience belt slip along (that's why upgrade the idler kit, stock are junk run the risk of exploding) with the possible extra cost of BAP and MAF upgrade, but each car is different. I'm just trying to figure out how much the worst case scenario would cost (buying supporting mods) with a dyno tune lol.