I have a 3" downpipe and exhaust, tapering down to 2.5" to clear the rear diff and connected to the original back box. Zero drone and a lovely burble sound. So glad i never threw the stock back box away years ago. Much better sounding than the previous setup which was the standard downpipe connected to a 2.5" system and one small back box, that setup was so droney way to loud!
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Could 2,5"/3" exhaust system be quiet?
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On my UrS4 I have a 3.5" straight pipe from turbo to the original back box and it's awesome! No drone at all, very quiet when cruising, but a nice 5 pot rumble on WOT.92' UrS4 2.2T
89' 80 Quattro 2.3 20v
93' 80 1.9 TDI
92' 100 2.5 TDI
99' Cabriolet 1.9 TDI
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Originally posted by rafa89 View PostOn my UrS4 I have a 3.5" straight pipe from turbo to the original back box and it's awesome! No drone at all, very quiet when cruising, but a nice 5 pot rumble on WOT.
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