I've got a 1996 with an open differential. I'm looking to upgrade to a Torsen so I can get some more traction and maybe get a little sideways. What do I all need for the upgrade? And is there a How-To I can follow? I'm not afraid to get dirty, but I'd like some knowledge on how to get this done, pictures literally mean a thousand words to me.

Is this all I need? Or do I need more?

 

https://www.miataturbo.net/suspension-brakes-drivetrain-49/obx-helical-lsd-56707/

There you go.

 

http://www.miata.net/garage/diff_rr.html

Here's your step-by-step.