After four years of driving the Roadster, I decided to do some easy tuning and installed an induction box.
Before installation, I was worried about the noise because there was an opinion that the exhaust noise would increase, but after installation, it didn't bother me at all.

As for the intake sound, I couldn't notice any dramatic change unless I increased the RPMs, but I think the intake sound and acceleration from around 3000 RPM is quite exciting and good.

●Yoshi from Toyama Prefecture (Roadster/ND)