I was curious, what if we can customize our engines hp and torque by slide bars in tuning section of vehicle customization? We can choose the rpm limit, rpms where the highest hp and torque appears things like that. No texture change in engine but, think about it. It might be a hell a lot of fun messing with it.
Currently you can achieve this two ways - -Edit the engines jbeam file -Use the Customisable Engine mod (I have yet to test this on the 0.17 update)