I installed almost all of these parts soon after buying the car, so I can't compare them to the stock car, but I think it's a pretty good car.
I recently installed a sports induction box, and although I've only been driving on public roads so far, it does seem like the car has more power.
I'm looking forward to my next run at Suzuka Circuit (I run at Suzuka Circuit about once a month).

●Masatsugu (MAZDA2/DJ) from Aichi Prefecture