Quote:
Originally Posted by deathrazor  A twin-scroll turbo reduces turbo lag, slightly improves fuel economy, and according to the facts there it gives more torques and horsepowers (improved efficiency). The last item(s) on my list is the most important, followed closely by the first. |
You have a point there........though apparently I'm also thinking of something else. I'm having the notion that a probable reason as to why it is not being sold outside Japan is because it might call for uber high-quality fuel.
You know something like unleaded fuel with an octane rating north of 100. I've noticed this as well in cars like the Legacy where the JDM spec have rev limit that is up to 9k (while overseas versions only up to 8k RPM).
Any other opinions or ideas?