I recently got my 1st jeep, and need some advice. It's a 2008 JK 4 Dr, and so far it's got a 4" Teraflex Lift, 35" BFGs, Airaid CAI, and in the next few days a throttle body spacer from Air Aid. I know there's mixed feelings on those, but hey, it was a free offer. So, now my next move. I really want more power, so it's either upgrading the muffler, or regearing. Now, in time I'll do both, but what would you guys recommend 1st? If I go with the gears, should I go 4.88 or 5.13? Anyone know the advantages on either or with the 35" tires? And the muffler, any reccomendations? I like the way the Gibsion split looks, but haven't heard much about the performance. I'm leaning towards magnoflow, but not sure...your thoughts? Oh-also, auto trans, currently 3.73 gears.