regarding exhaust...
on my wifes 2011 civic sport, i have a custom 2.5inch mandrel bent system made up for it, with a x-force muffler on the back, sounds awsome a nd has actually picked up a few kw throughout the revrange and hasnt lost any down low response...
i was looking for an intake, but gathered that it would only suffer from heat soak and best option was prob the stock airbox...