Not Ranked
Jon,
I had them on my Cobra which I sold a couple of years ago and never had any problems at all. I do believe they were a tad louder than the regular pipes though as I had an inner diameter of 4". Not sure that extra size made the difference, but when I was among 6 or 7 other Cobras, you could hear mine above them and I had long exhaust baffles in each pipe. And they seemed to stay hot a little longer than the others too.
Ron
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