As I say, it's a roadbike (road car) thing. The car guys generally junk them because many sound better with it removed (more intake growl... then again, they're moving a lot more air), we junk them as they serve little to no purpose at the kind of throttle openings and RPM used on track.

I'm sure Yamaha and Honda, and Mazda, Toyota/Subaru, BMW, and Porsche, and many others, could produce a whole slew of technical information advocating their presence. (They're just the manufacturers that spring to my mind.)
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Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

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