well, I have 4.4i mufflers installed on my 3.0d....I wether permits, I'll try to shoot a video for you guys to see the "soot situation" IRL...I must say though that my 3.0d does not smoke a lot. Almost nothing. But I only have like 200km on the clocks, so maybe that will change...I'll try to post a video this weekend...

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'82 Autobianchi A112 Abarth (weekend toy)
'89 Lancia Delta Integrale 16V (very fast weekend toy )
'02 Z3 ///M roadster
'02 ///M3 SMGII