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Originally Posted by ul2mitt
Are the JPipes custom? Do they help tone down the drone? I'm assuming that is why you have them........
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Yes the J Pipes are custom. I used a frequency analyzer app and what's called the Helm Holtz equation to eliminate the undesired drone. It works perfectly when the J Pipes are closed off at the end. I had the caps removed to have a half muffler delete sound and it that worked like a charm. However with an open ended J Pipe you do get a slight drone, but one you can live with.
All that said, now that I have a DP I'm going to close the J Pipe again as its a bit too much for my taste.
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