I'm pretty sure someone did that on the 10th gen si and it fit, there is a lot more room on the 11th gen back there so it probably would fit aswell. I'm not too sure about what needs to be done to make it work though.
Replaced the inlet pipe, was not hard at all. The only part which was kind of annoying was getting the vaccum hoses off. I swear even after twisting the adheasion off it was still a struggle. Way easier putting them back on though. Replaced the one time use clamps (really honda?) with reusable...
I live in tulsa, oklahoma. It rarely ever gets below 32f, I've seen others using 5w-30 with no issues. I have also heard that ester based oil is good for protection and I do plan on tracking my car this spring. Which oil would you recommend though?