eric.schwartz.
Well-Known Member
Hi everyone I've got a new 2014 Civic Si and in a few weeks I plan on putting a K&N typhoon intake on to it. Will I see a lot of horsepower gains even with the stock OEM exhaust system? I know about opening up and free up the exhaust but then Honda for 2014 and 2015 make the exhaust system bigger on the 2014 vs 2013 model year? Thanks for any input, I appreciate it.