We’ve already got 90% of the new trd group from Toyota give us the TRD Camry.
We should be able to tune boost by gear, boost level etc etc, also down size in rim diameter for more of a “drag” look.
Being able to make the car even lower then fully dropped/bags/coilovers type of thing
Engine bay customization especially, being able to see the turbos or supercharger etc etc. interior customization like race interior street interior, boost gauges etc.
More precise upgrades, like torque converters, rear and swaps going from irs to solid axles, 4 link, ladder, etc, and ACTUAL launch control/two step with options for lots of back fire very little (flames)
AND BETTER OFF ROAD PHYSICS and more choice in lifting and lowering vehicles, and more camber stance type of stuff
As well as more track car stuff, even with slick race tires and tuned suspension some cars can’t turn worth a da*n more aero