Exhaust, u/d pullies, and plenum, I'd give him 270 at most considering the COPs, Maf, and CAI pretty much do nothing but drain the pocket book. One of the reasons why I stopped renewing my sub to MM&FF....
you think thats bad, in the diesel world its even worse. Someone will have a downloader stacked with a pressure box lets say the downloader is 125HP and the pressure box is 65...well on their 325HP rated motore their now at 515HP, then they add the 20HP their exhaust is rated at and its 535 but their intake adds 15% so they take all their numbers added and add the 15%, now its 615HP...Sadly enough the dodge guys seem to do this the most.