[FT86Z]

I have a 4.88 on my 2015 brz summer street car. Overall I'm pretty happy with it as it feels like a new car. Definitely the best bang for the buck to get some low end pep on NA, but the only tradeoff is the high pitched gear whine at about 75mph and beyond.

It did quiet down a tad after a thousand miles and a fluid change. In terms of cruising RPM and fuel mileage, it's not much different from stock and I adapted pretty quickly. Lane changes are effortless now.