: Many fast cars and motorcycles, such as the Rayfield Caliburn and various Quadras , feature visible and audible exhaust pops (backfire) during hard gear shifts or when letting off the accelerator.

While you cannot manually tune the "pop" frequency of an exhaust in the vanilla game, you can modify vehicle appearances:

: A known technical issue sometimes causes vehicle exhaust sounds to vanish entirely. This is typically fixed by exiting and re-entering the vehicle .