Why isn't this the standard?

● Mounting parts: Sports flywheel, ram air intake system, intake suction kit

When the new car was delivered, it was installed at the dealer along with the exhaust manifolds and mufflers made by other manufacturers.
Why isn't this the standard for sports flywheels?I don't see any drawbacks.
Even when I sometimes compare it with other people's ND, it seems that the acceleration is so sharp that it is said "Is this 2000cc?"
I don't know the difference because the ram air intake system is attached from the time of delivery, but when I open the hood at the time of a meeting, it has the effect that people come closer to me, saying "Wow, this is a very expensive guy!".
If you attach it at the same time as the suction kit, maintenance is a little difficult because it is not elastic, but it is fun to open the bonnet.

● Koichi Toyama (Roadster / ND)