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					Originally Posted by jmitro  so here's my cheap chinese muffler that drones like crazy at 2500-3000rpm but otherwise sounds pure bred and high strung.  
 how would one add a cross over pipe to reduce drone and would it even work?
 
add a small pipe connecting the two exhaust tips which is downstream from said muffler?  or maybe a straight pipe connecting each muffler together?
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If you’re going to add a crossover, I would think that upstream of the mufflers would be best.