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In TaoBao you can find the necessary parts. At the moments seems to be a shortage of 300cc heads in the market. So they got very expensive. I have still a modified 250cc head. I increased the inner...

The above shown is nothing but a pipe with diameter larger than the bended front pipe. No other interior in the muffler. It has a nice dark sound and especially with my 300cc kit it helps to breath...

i have put following muffler on:

18929


https://item.taobao.com/item.htm?spm=a1z09.2.9.130.oh6bHr&id=24702176011&_u=p1mbv2am479a

But as it was on longer ride annoying loud I put now a DB...