Where to get Quaife Installed?

A. I know that other kid, he was an idiot in high school and still sounds like an idiot now.

B. A stock maxima with an open diff sux pretty bad so i want a quaife and thats all. If itll make that much of a difference, itll be worth it. I dont like to spend money on mods because thats money that for the most part I will never see again. Like I said, this would be worth it for me.