ALL DMS CARS REQUIRE THE LATEST CSP TO RUN
Version 1.77 or higher is needed. you can update your CSP like this:
Step 1: Go to the top of your content manager and click on Settings
Step 2 : Open the Custom Shaders Patch Tab
Step 3: Click on About & Updates
Step 4: Then Select CSP version 0.1.77 it will install for you and then you will be able to run the cars
note: I run a beta version of CSP as I sub to X4Fabs Patreon, if you would like to run his beta version of 1.78 here is his link game changing work this guy is doing https://www.patreon.com/x4fab