This phrase isn't really about a V10 engine. It's about:

This guide covers the FH3 V10 "Auto" mod—a high-performance, exclusive car pack or script (depending on your source) designed for enthusiasts looking to push the limits of their virtual garage. What is FH3 V10?

: Security analysis of previous versions (like V7) has flagged these executables as Trojan Droppers , receiving threat scores of 100/100 from some sandbox tools.