Hi first post in this discussions I need to make a free flow for rc200 I have decided to make the header and mid pipe of stainless flexible corrugated steel ...and put a can at the end for least noise..(don't like loud exhaust ) ....sovbesides getting any suggestion I have ala question in mind what is the exhaust valve diameter. And opening angle of the exhaust valve ...cant seem to find it anywhere on google pls hwlp
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I had one hell of a time when I had my rx-100. 


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