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      08-21-2008, 01:40 PM   #6
n3985
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One old school way of making the exhaust louder was to run your car till the muffler gets hot, then sticking a water hose with water running into the exhaust tip. The hot fiberglass will disintegrate and voila, louder exhaust!

(some guy with an E46 M3 posted a vid on m3forum a couple years ago too)
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