I have a '14 BRZ, and most of my mods have been functional with a couple of cosmetics thrown in. I drive mostly long highway miles (almost exactly 30,000 miles in 12 months of ownership). I have done no performance mods, because I really haven't felt the car needed it.
The first thing I did was add a
Cusco heel/toe pedal.
The next thing I did was swap out the stock triangular knee rests for JDM padded ones for highway comfort. (Now you can get them domestically.)
Then I fabbed my own cell phone holder (seen
here), because the aftermarket options were pitifully inadequate.
I also run Torque all the time on a separate dedicated phablet (seen
here). Not really a "mod" per se, but still very useful.
Then it was Tom's tails and a Tapturn with strobepack. That wasn't just cosmetic. I have a recurring problem with people tailgating me in this car, and the strobes are useful in getting some of them to back off.
Then I did JDM Toyota clear side markers (with amber bulbs), just because.
Then I installed the
FR-S armrest, again for highway comfort.
Then I installed a
Beat-Sonic Blaid antenna, which provides no functional improvement whatsoever. Sometimes I look at it and really like it, and other times I look at it and think it looks stupid as hell. I started to remove it once but couldn't find the allen wrench, so it's still there.
I have a set of RPF1s for it, but I'm waiting until I burn down the rubber on the stock Primacy tires before swapping on the Enkeis with Michelin PSSs. That will be my first "performance" mod.
I keep threatening to put a loud exhaust on it, but then I think of how my head will ring after a five hour drive and don't.
Finally, I have everything I need to install a real oil pressure gauge on the car. I have a
JP Instruments slimline digital oil pressure gauge out of a crashed Beechcraft that is almost the right size to fit in the center console where that stupid clock is currently located. With all the crap I keep reading about oil starvation and spun bearings, I really ought to make this a priority, but my Jeep project keeps taking up all my time.