Exhaust note and sound character

The M156's exhaust note is treated as a core part of the car's appeal, described as genuine mechanical pops, bangs and snarls rather than synthesized sound. Owners praise the cold-start and the syncopated V8 wail under throttle, and many consider the stock exhaust good enough that they never modify it, though resonator and secondary-cat deletes are the most common sound mods.