Well, you could always drop a little on the 4.10's, an intake, and a shot of nos and be dipping towards if not into the 11's - but personally I'd spring for that 4k investment just for stability of the engine. These motors seem to be pretty stout thus far, and adding the intake and tune alone will boost that 300 hp to 340 at the crank depending. However, to do that you're looking at 650 for intake 250 for gears, and 400 for a nos set. My logic may be off , but if I'm going to spend more than 1/4 the price for not 1/4 the gains the charger could put out, I'd go do a little financing magic (home equity maybe? or sig. loan? or tax season is around the corner if you're in the US - that's always a good time ... note to self ...) and have yourself an 05 sleeper beast.
And 05's are running low to mid 13's stock.
Drop that down to mid to upper 12's with an intake, tune, and exhaust.
Drop that down to mid 11's with nos, gears, and tires to hold that baby to the ground.
Might even pull it lower if you wanted to invest in
lower control arms (
LCA's) and helped put that power to the ground.
There are several people in here running 285's all the way around, myself will be running 285's in the rear 255's in the front.