Most of it is emmisions they say butnot really cause there most come LEV/ULEV/SULEV . The thing is that Honda wants to classy up some models a little like My 04 Accord Tureno, they dress her up a little, take away most her sport Edge and performance specs and call her a Acura TSX just so they can make americans shell out more bucks for the Acura Badge.Seriouslly, Like the Honda Legend is a more performance oriented peice here than there, lots of its characteristics stem tho that we drive right hand drivers, and i guess the ones yu get are that way cause they are modified Right to left configurations