A sound clip from outside of the car on my NEW Custom made exhausts with CATS removed....
The car does Revs fasters...Less backpressure....I though that I would have more resonance in the CABIN...but its opposite..
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Anyways check the sound of my M5....
http://www.tt-leser.at/image/P1000298.MOV
P.S.
For anybody who might know....I have removed CATS and kept After CAt O2 sensors...and Have NO SES lights...I am so HAppy....but I was told that the CAR might run in a FAlesafe MOde....-15-20% of engine power....but car feel quite strong....and Computer does not show me any faults.
The car does not run RICH....So should I re-program the car to No-Cats mode and Give more petrol...so say I should get a better throtle response and so more power....but will eat more petrol and black smoke will come out from the car when flooring....