Air box mod save $$$

[Greg_imp]

I didn't notice any difference in sound without the snorkel; and it's called that because it's designed to prevent the engine inhaling water. The rubber bung covers the place where an emission device not required in the USA is connected.

When you're figuring cross-sectional area you should also consider the potential restriction created where the opening of the duct (snorkel) meets the part called Fender B in the OEM parts catalogs.

Like I said, I sat with the Dyno operator: one run without the snorkel, the next run with - no difference.

The pictures are good. It's nice to know how things work.