I recently installed a NM module on my (new to me) 2014 CMS, what else can be done that will not affect emissions and won't void a warranty?

 

An intercooler would be your next best bang for the buck.
https://www.waymotorworks.com/forge-...r-s-turbo.html

Also keep in mind you can do anything you want to your car and they have to prove that part caused the failure in order to void your warranty. It isn't legal to just void it without proving it.

 

Going to move this to the Mod area. Trying to do a little cleaning up here in the Countryman subforum until somebody volunteers to help out.