The full mod list that affects the sound won't fit in the title:
3.5" dinan intake with Bosch MAF
Riot Racing BB Throttle Body
Schrick mild cams
Schrick intake manifold with gold foil underside
Turner Motorsport authentic ceramic coated shorty headers
Bimmerworld single 3" exhaust including y-pipe
Turner Motorsport Stage 4 tune
This is a few quick clips driving on a good road in my area. The recording sounds a little raspier than the car does in person, but overall it's representative.
