Our stage 3 kit includes a custom tuned flash rated at 600Hp on 93 octane.  We offer custom race gas files as well when the 3 tune option is selected. This kit includes our custom 2 muffler sport X design exhaust with 200 cell cats(dual tips additional cost),  4.5″ Race intercoolers  for better flow and cooling. Optional matching 2.5″ competition Y-pipe is strongly recommended for better flow via the 2.5″ connections.