Edited on 2015-04-08 21:11:25
IMHO, If you can do it nowadays, do it. Years ago it didn't exist unless you ran with no speedo and all the rest. Its a completely different car with the 5 speed. Off the line snappier and the over drive kills the revs on the highway. That's a good thing.
What unit? t5, japanese?
Also, better seals , no leakage.
Good luck
GTJOEY1314