05-13-2015, 11:13 AM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,519
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Not Ranked
From the description of the muffler they may be SpinTech mufflers. I have them on the undercar exhaust on my ERA and I have a buzzing, tinny sound out of the passenger side when the car is warming up. There's nothing loose in the muffler (took it off and shook it and tapped on it with a mallet) and it tends to decrease once the whole car is warmed up. These are a baffled muffler similar to Flowmasters and I wonder if it could be some resonance in the baffles.
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