Re: Bimodal exhaust - can it be modified?
You don't want to do this. The valves are pretty much always open anyways. They only shut when MDS is engaged. The SRT is nothing like the Cayenne or other brands with valves. With them you are correct, open the valves (sport mode) and it gets noticeably louder. The SRT is not like that. They are primitive mechanical valves whose only purpose it to make MDS mode sound less like a weed eater. Keeping the valves permanently open will not make it louder.
If you insist, just wire them open.
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