I am happy with the A12 and probably will look into a better exhaust. I don't think making the tail pipe bigger than 3/4 inch will help on the stock pipe. The inlet of the pipe is 3/4 inch on our buggies.
But I agree that the overlap is helped with the better flow of the muffler. I am thinking of getting some pre bent pipes about 7/8 inch and making my own header and using a dirt bike spark arrestor.
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