5spd: LSD or quaife, at least a stage 3 clutch, drag radials, S/C with a 3.2 or smaller pulley and CAI, Y-pipe, catback exhuast and high flow cat, NOS, and a whole lot of tuning...
Auto: Custom built transmission with LSD and treated gears/custom TC.
The fastest Maxima is an auto running 12.2's right now on NOS, the next fastest is a 5spd with internals from a Vq30det running 12.5or .6 with a S/C and NOS