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What is the difference between the Yosh Duplex System and the regular Yosh Full Exhaust?

The Yosh Duplex System goes 4 - 2 - 1 right? The two left headers mergeto one, and the two right headers merge... is that correct? If it is different, how does the Duplex system merge the headers?
 

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the duplex system of headers uses a cross-connector pipe between the headers to help "balance" the exhaust gas pressure b4 it makes the big bend toward the can. i think the difference is only noticable on the track..........
 

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I would not say that you only notice it on the track... I have been on a 600 without the duplex and one with... you can feel the difference...

Migz, most of the time the crossover is the way you said above.. but they could have changed it to make it put out more power( or change the power band).

It is to give you more mid-range power.

John
 
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