Pop and bang tunes are popular among car enthusiasts who want to add a sportier, more aggressive engine sound to their vehicles. The pop and bang remapping works by modifying the engine control unit (ECU) to enhance the engine’s exhaust note, producing pops, crackles, and bangs during gear changes, deceleration, and other events. These types of modifications can be added to both petrol and diesel vehicles, although the methods may differ. As you mentioned, for petrol vehicles, a lift-off/overrun can be used to produce pops, crackles, and bangs, while for diesel vehicles, a “popcorn limiter” can be added to create a “popping” sound at maximum revs. It’s important to note that while these modifications can enhance the driving experience, they can also potentially impact the reliability and longevity of the engine.