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jtbo,
You cant dispel a 'myth' with a non-documented article by someone with no last name.
niky.
I am sure there are a lot of 500 hp engines running 2". The dameter size is rcommended of an optimal size given the max hp being run.
just like you can run 2" with a 90hp motor. you just wont be optimal.
The point here is that posters keep providing their 'personal' experiences saying larger is better. It's not. period.
If a poster disagrees with this chart, then find a chart(or study) to disprove it.
It really is that simple.
And all the talk about the exhust manifold is all well and good, except noone is going to go uot and buy a tuned manifold. they are just going to fix the pipe and muffler.
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