I recently installed (in order) the Cobb pitch stop, Perrin shifter lockout, Cobb shifter plate w/ Perrin brass shifter bushing, Billetworkz weighted shift ****, Whiteline differential inserts, Whiteline positive gearbox bushing kit, and now the group N transmission mount. Theres chatter amongst other installers about increased NVH, but I didn't notice it at all. Certainly nothing over the top that you wouldn't believe was stock to begin with. Shifting is super smooth and has a much more connected feel with way less play. "Bouncing" from hard shifts/downshifts/clutch dropping is drastically reduced. People have said it over and over, but I'll say it again... this is how the car should have come from the factory. Feeling how the car is now, it's almost laughable how bad it was before and that Subaru thought it was OK to ship out them like that.
*** IF YOU ARE CONCERNED THAT ALL THESE PARTS WILL MAKE YOUR DAILY DRIVER UNCOMFORTABLE OR LOUD FROM NVH, DON'T BE. ***
I installed most of the parts one at a time to see what kind of difference each part made. The positive gearbox shift bushings are a must and offer a very noticeable, more connected, improvement in shift feel and "bounce" reduction under hard shifting. The positive shift bushings also drastically smoothed out up and downshifts in the lower gears under all conditions.
In combination with the differential inserts. The clunking in the back under hard up/down shifting was all but gone. Even my wife noticed the difference. Before she didn't want to be in my car because of the "jerking" when shifting.
The transmission mount was the icing on the cake. It like a whole new car. Shifting is so smooth, I'd dare to say it almost feels like an automatic aside from 1st to 2nd. But even that is significantly improved. So happy with the end result and cannot more strongly recommend the parts I've mentioned. They're relatively inexpensive, and make a huge difference. Just do it.
