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Originally Posted by rmedina
I had the zoomers on for about a day. I had to take that thing out.. The tone was never constant. What I mean is that the sound of the exhuast was never the same. When you are cruzin it sounds ok but once you ease off the gas then give it some it sounds horrible inside the cabin. For example if you are out on the streets and come to a red light. Once you give just a bit of gas it would make this ugly knocking noise. The guys around here all told me it because there is no backpressure and the hemi does require some bp. The weird thing is that you can only here the knocking noise from the inside of the car. From the outside it sounds nice. Go figure..
Rmedina
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One day? I've never heard any one complain about any type of drone or resonance at any speed. Was it knocking like "pinging" cylinder detonation? Did you check for any leaks? Was the system clamped and welded? Sorry to hear of your problem, before you took them off perhaps we could have discussed a possible solution. I guess everyone’s ear is different and tolerant to different sounds. Our patented tip design does a good job canceling out the exhaust pluses that cause drone or cabin resonance. We developed the venturi tip for just this purpose to cancel out the noise with out loss of performance.
