Turbo header design

[ECMnut at aol.com]

In a message dated 1/7/99 5:19:29 PM Eastern Standard Time,
dave.williams at chaos.lrk.ar.us writes:

> 
>   That's exactly how the factory exhaust on my Yamaha XJ650 Turbo is
>  configured.  It could be considered a long 180 collector or a short
>  second branch tri-Y.  The service manual says it smoothes the exhaust
>  pulses to make the turbo slightly more responsive than a normal
>  collector.
>                                                                             
How exactly is it? like two two-into-ones?
Thanks,
Mike V.