Not really, but my iMID says it's time to change the air filter, and I'm extremely wary about cleaning the K&N (what if the internal cotton gauze tears?) and possibly over-oiling the cleaned filter, which can easily cause problems for the MAF sensor.
It adds precisely zero power, so OEM seems...
To be installed soon -
Swift Spec-R springs
Koni Sport (Yellow) rear shocks
Koni Sport (Yellow) front struts (modified to fit by King Motorsports)
Buddy Club rear camber arms
Advan Racing RZ-II wheels (Indigo Blue - 17x8" et37)
I actually just received my winter wheel and tire set up for my 14 TW Si sedan.
16" Sparco Assetto Gara wheels in bronze with Continental Extreme Winter Contacts in 205/55R16.