Sad to say but that repair is not going to last. I used buy Two Brothers CF exhaust and this was a common occurrence. I've formed an opinion that Two Brothers exhaust are crap and I will never invest in their exhaust again. The material they use with the CF exhaust becomes brittle and crack over time. The only way I was able to permanently repair the exhaust was to run a brace from one end of the exhaust to the other, to keep it together. I tried cutting an inch off as stated, I tried twisting it, like you did and all the repairs fell apart over time.
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