i think most V12 drivers would say "silence is golden"
i would rather run those glasspacks on a V8, because the V12 itself is a very silent engine.
have you tried to empty your rear silencer? the effort would be much lower
passing the TÜV is not the problem... getting your exhaust registered is it.
just mounting a normal exhaust for TÜV and pack the modified one under the car after the TÜV is what we can do.
but if the police notices your modified exhaust that is not registered, they can immobilize your car. you have to mount a normal exhaust, show it them again and pay your penalty
