If you're playing the PC version and experiencing lag, users often recommend updating to nGlide 2.10 and switching the video backend to Vulkan for a smoother framerate. soggi's BIOS & Firmware Page
If you're looking for these files specifically for the (using the Dethrace engine), a widely recognized "solid post" on Reddit's r/VitaPiracy provides .7z archives for both the base game data and the Splat Pack DLC . Quick Tips for Carmageddon .7z Files: Carmageddon.7z
It sounds like you're acknowledging a reliable source for game files. If you're playing the PC version and experiencing