Originally Posted by Matt Monson
Twice I have done this for bugeye WRX customers who had highway commutes. Before we swapped gearboxes for them, we would open it up and put the 0.73 stock WRX 5th gear in the box. Thing is like a rocketship to 110mph+/- and then they can still cruise the highway at 75mph without running the engine at 4000+
The only place this really doesn't work is if you want to track the car. Then the 4-5 shift just has way too big rpm drops and takes all the fun out of going to the track with it.
I've been considering doing this, but with an RA 1-4 into a 3.9 FD gearbox. Less rocketship, but gets you to ~132 MPH in 4th at 8k redline. Much less limiting than 112-ish of the 4.44