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I've seen it on a bunch of forums, but never a Scion one. I think it's mainly done on Jettas for some reason, but I've also seen it on Tahoe/Yukon, Benz, Ford, and Miata forums. If you don't know what it is, it's where people will drill holes from anywhere 9/16" to about 2" in the bottom half of their stock airbox. Most say it just sounds cool, others claim to see "improvements in performance"...
Have ya'll ever heard of this?
Have ya'll ever heard of this?