This works w/all the non-EGR EJ22's (most manual cars from '95-98, and any '90-94 EJ22) and should work on the non-EGR JDM EJ25's, too, and doesn't require drilling/tapping the driver's-side cylinder head. (You'll need to get a single-port exhaust header/y-pipe for the '96-'98 EJ22.) BUT REQUIRES a...