Cats back

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DuncS3

Active Member
Joined
Sep 26, 2012
Messages
771
Location
Surrey, UK
Car
2017 C63S Coupe, 2005 E46 M3, 1988 Audi quattro
I have had my secondary cats put back on my car, thanks to Imran and Acid from MSL/Torqueflow. I have to say as its been about a year, I did not realise how refined the standard system is compared to a secondary cat delete - the car used to sound immense and now its just 'ok'.

Not only has it lost extra volume as you would expect (I'd say the cat delete is about 30% louder) but it has lost character, i.e the gurgle and pop on the overrun, the 'thwack' when changing up or down is much quieter also - it is much more refined.

The new C63S, with the sports exhaust is imo, louder than the 6.2 C63 in stock form.

onwards and upwards!

Dunc
 
Why did you put them back on?
 

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