I would recommend a tune for it if leaving stock. The tune adds 15-20 hp but more importantly changed the crappy oem shifting schedule that gets you to overdrive ASAP. The tune doesn't hurt anything, is plug and play thru obdII port and stock tune can be reinstalled easily. Tune thru mail or email via MO's Speed Shop, Dallas,GA. He does not frequent this forum but pretty much any member can endorse his tune.