Flowmaster Cats & X pipe ? - Ford Mustang Forum

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post #1 of 3 (permalink) Old 12-10-2012 Thread Starter
royscobra's Avatar
Joined: Dec 2012
Location: Buckeye
Posts: 4
Angry Flowmaster Cats & X pipe ?

I just bought this 03 GT Convertable, with the flowmaster cat & x pipe. and apears to be stock mufflers. The sound is great untill it hits about 2 thous RPM and then the very loud drone sound kicks in. On the flowmaster site they say there 3 chamber muffler is moderate? It also says it will help with the interior noise. Anybody try this or have a differant fix. Cant hear anything after 2000 RPM.
Thanks for any help

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post #2 of 3 (permalink) Old 12-10-2012
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Joined: Aug 2012
Location: Casper
Posts: 424
lol. I had a custom H pipe with a frankinstein system and two sets of hollowed cats and it had a mad drone around 3500. Then I went straight pipes with only one set of hollowed cats and now its so loud I get pulled over.

The dynamax line has good drone elimination on their mufflers. Tho, I don't like the drone.

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post #3 of 3 (permalink) Old 12-10-2012 Thread Starter
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Joined: Dec 2012
Location: Buckeye
Posts: 4
Question Drone

I talked to a shop today & he thinks if he instals a turbo my problem will be over. It may be a mity price to pay.
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