Foura
Jedi Hopeful
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My 4A has the older style twin muffler twin pipe exhaust system with a Y branch after the centre mount. I am contemplating going to a single pipe of about 2 1/4 diameter with a straight through muffler and perhaps what we used to call an echo box to keep the noise manageable. I had that arrangement on my 3A many years ago.
Does anyone have any real world experience of performance improvement from getting rid of the Y branch? I recall reading somewhere that a better exhaust flow was why Triumph went to the single exhaust and cross mounted muffler on later 4As.
Does anyone have any real world experience of performance improvement from getting rid of the Y branch? I recall reading somewhere that a better exhaust flow was why Triumph went to the single exhaust and cross mounted muffler on later 4As.