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Old 11-12-2013, 01:45 PM
RamCharger86 RamCharger86 is offline
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Default Mufflex 24 Drone, related to welding?

I had a mufflex 24" welded up at the clamps due to them leaking and not being able to seal them up.

I have been dealing with a pretty bad drone at 1500 rpm. I noticed there is a small hole in the weld on the inlet side of the muffler, that has some black soot.

I took the truck to the mechanic and he said that this is normal to leave a small hole for condensation to weep out. I have had several cars with modified exhaust, and have never heard of this.

Could this be making the drone worse? Is this a welding procedure that anyone has ever heard of before?

Thanks for any replies!
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Old 11-12-2013, 07:59 PM
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Some mufflers do have a drain hole to allow the condensation to seep out however the drain hole would not be the reason for the drone. There are different things that could cause this such as the muffler itself, or possibly the length and diameter of the tubing used in the exhaust system. Tough to say why your exhaust drones as I thought the mufflex 24" did not have this issue.
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Old 11-12-2013, 08:55 PM
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there is a kit you can get from mufflex to reduce drone. it may be because the stock muffler is tuned to minimize the effects of mds and the mufflex is not.
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Old 11-13-2013, 09:06 AM
RamCharger86 RamCharger86 is offline
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Thanks for the replies! I think I am going to save up and switch out to a full catback after talking to Borla. They were very helpful and told me that when you swap out a muffler, that there is no way to guarantee that there is no drone. They recommended a catback, however said that they were surprised that a 24" magnaflow wasn't enough to tame the drone during mds.
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