The SRT8's are very quick. It's becoming very common for the Jeeps to run low 12's with just a tune and cai. With the all wheel drive they get easy 1.7 sixty foots on street tires. If you see a Jeep at a stop sign I advise you to look for other prey, as it launches like a rail gun.
There are also a few that have run 11's with just a tune, cai, and cam.
There are a couple guys that have added a Vortech and ran 11.1's. They are definitely not slow.