I installed five TB spacers and doubled the HP on my 3.8.
5? I did three.... man I need two more....
No really the regear was my best mod. I have the 3.8 and went to 4.88s after 3.21... night and day.
2008 JKUS Banks Monster, 4.88 G2 Gears, PureJeep Rocker Guards, AEV Savegre w/315/70/17 Duratracs, Body Armor Rear w/Tire carrier, Teraflex 3" with Bilsteins, Rough Country Bumper with Engo 10K install, Evo sleeves and gussets, oh yeah and Flat Fenders.