NC LSD Swap, 3.7 to 4.1

  1. My model of MX-5 is: 2012 Sport with bbr super 225
  2. I’m based near: Bucks
  3. I’m looking for technical help or recommendations on: Diff swap

Hi all,

looking for some info on swapping the lsd from a 3.7 to a 4.1. Has anyone done so, and if so what’s the feedback? I see in the US they like to do this swap, or even to a 4.7 from an rx8, but this would of course make 1st pretty much unusable.



I always had a 4.1 lsd in my Mk3 race car…
I’m a big fan​:+1::checkered_flag:

Where can we get one Paul ??

The 2.0 5 speed is what I used, alternative get a 1.8 diff and put a LSD in it