i just put a 4" spintech catback on my car. sounds awesome. there are a few sound clips and a breakdown of brands, power-produced and decibel levels for most of the popular exhaust systems here: http://www.njfboa.org/forums/showthread.php?t=29265
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>2008 Corvette - Borla catback/K&N
>2004 Jeep Grand Cherokee Limited 4.7L HO 4x4 black/grey
>1985 Honda Sabre V65 1100 - jetted/K&N
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