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Since these are not "true duals". What is the advantage over the stock 2 into 1 into 2 stock head pipes? I have an 09 Ultra Classic and trying to decide on an exhaust upgrade.
 

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I put a set on on my 11 Ultra, this removed the cat from the headers reduced heated, improved the sound and a minor improvement in performance. I had to change the fuel settings on the tuner to match the new set up.

I think they also look better than the standard headers.
 
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