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"The concept is devilishly simple: take a metal tube, weld it snugly into the end of your car's tailpipe so that the exhaust is forced through it, and presto -- you've converted your ride into a giant noisemaker. The sound emitted by whistle-tipped tailpipes is not quite a whistle."^^<http://www.w3.org/2001/XMLSchema#string>
<http://posting.eastbayexpress.com/oakland/Tools/EmailFriend?oid=1166616>