Hey guys I just got a 2015 Si Coupe a couple weeks ago and it came with a Yonaka exhaust. I plan on getting Hondata sometime in the next week or 2 if I can find a good deal on it on black friday/cyber monday (Let me know if you know any websites with deals). After that I want to get an intake. My friend has a typhoon on his 2012 Si and he likes it. I live in Massachusetts so I'm not really trying to get a CAI. My question is what would be the best gains for me to get with the exhaust and Hondata, a typhoon or something like injen or k tuned, AEM, etc?