Fuel still injected on overrun ignites in the exhaust and gives the crackle sound. Intensity can be set: soft (burbles), normal, hard or flames.
3 of the 3 BMW vehicles with this unit
| Vehicle | Generation | Fuel | Power |
|---|---|---|---|
| 3 Series M3 | E46 1998 - 2005 | Petrol | 343 hp |
| M3 E46 M3 | E46 1998 - 2005 | Petrol | 343 hp |
| Z4 M 3.2 | E85 2003 2009 | Petrol | 343 hp |
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