yeah, but rims are a bit different. they have weight and aesthetic influence and are more a matter for contention.
the exhaust takes the hot shit from the front to the back, and provided it makes the car go faster, WGAF which boffin made it?
besides - for something like the REX, theyve probably done more developent here than in JapLand anyways. AUS rexxes are a shitload faster than those in Japan.