yeah, That's where I came up with the idea, I know the only difference is the diff. in those tranny's (us spec). Since the tranny cases are the same on my Si it should work. I figured on ordering the LSD parts from the acura catalog at my work( an acura dealer). lmao, I encourage everyone on this forum to learn about cars and take some college classes if they can. I happen to know how to build trannys pretty good so forget sending it to a trans shop. Manual transmissions are really simple on Honda's. I had to replace a gear set on a 6spd 03 cl type-s a couple months ago and it's really nothing more then a civic trans. this idea has been boiling in my head for awhile now, The only thing that will suck is setting diff. bearing end load and stuff like that. I find shimming diff's very annoying and sometimes frustrating.