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#30: 08-14-2012, 04:29 PM
 
 kiltedyak50
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Location: Boulder, CO
Car: 2006 WRX vf48|2006 Legacy Wagon 2.5 SE
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I had a bit of a drone at a specific rpm, with a Cobb 3in to stock catback. You could always get a resonator to splice in if it's driving you nuts.

I think they're pretty cheap and might be an easier fix.
http://www.sfxperformance.com/parts/VIB1792.htm