Quote:
Originally Posted by VoytekM5
reviving an old thread...
Does anyone have a pic of their non CP resonators? Thinking of doing this but not sure if would make much of a difference in sound.
Are CP resonators the same as standard M5 exhaust?
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CP resonators are not the same as standard. See pic above of the CP one. Standard resonators have perforations inside. I removed my resonators (non CP) and disabled active sound. The car is quiet on the inside. I then forced the exhaust valves open. All that did was create drone when the windows where down under 3K rpms. But, cold starts were louder and there was a minor volume increase with the valves open.