Racing seat - carbon reinforced with removable halo guards.
Power Cell - The Eagle IV isn't a hybrid, but my idea was that the powerup system in Carmageddon needs a pretty decent amount of stored energy.
Various fluid containers and electronics accessories
Rim and Tyre
Quick change rear end/differential
Running Gear (quarter)
Front subframe, engine, and gearbox
Rear subframe and suspension
Running gear (top) - Enclosed driveshaft
Main chassis - Easily removable front and rear subframe to drop the engine and gearbox as well as the differential, power cell, and access to the rear radiator. Tiling textures and decals using Toolbag and a custom blend shader.
Interior UI elements
Various fictional OEM and aftermarket manufacturer logos