I test drove one with a valve cover leak onto the exhaust manifold on driver side causing smoke under the hood. I test drove another which supercharger wouldnt engage all the time. There have been issues reported of secondary coolant pump going out causing temps to read to high so the supercharger wouldnt engage. I would put as many miles on it and get it hot as possible on the test drive. Drive it hard but safely. Test out the slapstick tranny by downshifting down and upshifting through all 5 gears.

Be sure to verify the vehicles in-service date so you will know how much warranty is left before you have to pay for all the repairs yourself.

Have you driven an srt-6 yet? And what is the miles/price on the one your considering?