Headers and flowmaster exhaust. Then a K&N open element air cleaner attached to a hardline aluminium piping. And probably a new set of rear tires after 1 month of driving. I'll keep all the parts I take off, so I can replace them when I'm done playing. My son's Charger sounds good with the flowmasters. I thought that the Ford V-8s sounded good with flowmasters, but the Hemi sounds awsome.