Anyone running just a cat back without downpipes and a tune?
Not interested yet with tuning and downpipes. Car only has 5k miles..
If you use flap module such as ASR to keep exhaust flap to open full time, it will pretty much run as loud as it can get.
On yours, sound restriction is on downpipe with those 2 cats.
No aftermarket catbacks will make significant sound improvement vs. AMG Performance exhaust with ASR module activated.







