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Published on Aug 22, 2011
2005 cts-v with headers, high flow cats, 3 inch x pipe with 2.5 inch pipe to the mufflers. also has a cam, tuned, and sitting on h&r lowering springs. flowmasters had awful drone at 1500-2000 rpm, couldnt have a conversation at 60mph. the vts have absolutely no drone and flow better than the flowmasters.