This was the first thing I added to the car after I got it, and it has helped to protect the side panels and minimize dirt/debris accumulation. Seems like a better option than mud flaps since it keeps the vents functional and looks better (IMO). I would recommend picking up some spare fender liner clips.
315 hp ain’t enough you need more if you have a type r, get so bolt on and a tuned car would push high 300 low 400, a tuner helps you car really breath