Just remove all the exhaust manifold and let the gases just exit the engine without any noise filtering.

After about a couple of hours of driving, the owner will probably come back and ask for louder pipes.

Or a fleshlight

That’s almost what the “whistle tip” phase was, but with a bit more of that super cool “constipated goose passing a load” sound to it.

Now we got DSG farts. Kind of like a shart in an empty coffee tin on each upshift. “Bplarhpth” in English.