I installed the ''Raceroots performance'' cat-back single tip on my 8.
Its very loud and i think the cop won't like it!!..loll... Is there a way to have less sound with maybe some ''tips'' or others modifications??

 

Get a different exhaust if it is not the sound you like. Maybe you could trade someone locally for another one that they also do not like. You could also just sell yours as-is used and then buy another type.

 

ill trade ya mine!!!, custom single magnaflow exhaust with Magnaflow highflow cat/ Black Heat painted pipes.

 

Exhaust silencer.

 

Resonators! Its actually not that loud but then again I think everyone in California love loud. Its loud inside because there is no sound deadening material in our cars or very little of it. The way I got convinced it isnt that loud is have someone drive your car and just cruise around behind it.