ASR Exhaust Valve Controller
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Junior Member
Joined: Aug 2015
Posts: 60
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From: Ponte Vedra Fl
2020 E53
ASR Exhaust Valve Controller
I have a 2020 E53 C238 with the sport exhaust option. Having had a C 63S with the same option, I was never satisfied
with the sound. I discovered MB exhaust valves when on do not open till about 3000 rpm and never fully open.
I installed an ASR ExValve that allows the valved to stay 100 % open at all RPM. A remote control allows
to return to factory system , turn valves open or closed. I also remembers the last setting on start up.
Simple plug and play. I had a muffler shop install it in 30 Min.
Much better performance sound lacking on the stock E53 system.
with the sound. I discovered MB exhaust valves when on do not open till about 3000 rpm and never fully open.
I installed an ASR ExValve that allows the valved to stay 100 % open at all RPM. A remote control allows
to return to factory system , turn valves open or closed. I also remembers the last setting on start up.
Simple plug and play. I had a muffler shop install it in 30 Min.
Much better performance sound lacking on the stock E53 system.
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