Quote:
Originally Posted by LADYBMBLEBEE
Don't want to void warranty so the AFM delete not an option. I don't really know what Turn Down means? It is a catback - no resonators, just pipes from the cats to the mufflers. I talked to a couple of muffler shops about "J" pipes as I read on the forum that this can help but no one knows what the heck I am talking about. 
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Notice on this Magnaflow set-up that the j-pipes are attached to the exhaust pipe at a 90 degree angle to the flow path, which does not affect the flow at all. The ends of these tubes are capped, which prevents no exhaust gas to pass through them. This becomes a closed-chamber environment where the offending frequency or drone, as determined by calculation, is eliminated by feeding it back into the flow path out of phase. Simply put, it works.