Quote:
Originally Posted by jkg2101
i would like to try to preserve my polished sidepipes because I have so much invested in them and they look so good.
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The real answer is No.
Without cutting the pipes apart there isn't much you can do. A lot of people have tried a number of inserts that claim significant reductions. Here's an example. But they really don't do much. You might get 1-2dB reduction at best. Usually less than that.
https://www.summitracing.com/parts/d...0aAnOpEALw_wcB
If you want a significant noise reduction, you need to sell the pipes you have and start over with a clean slate.