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I know this is an old thread but I can't seem to find much on the kooks R300-14. I just ordered two for my x-pipe setup. I went from lm1's (way to loud with no tone on a h/c car) to magna-flow 5" cans. Now and it's just a little to quiet for me. This will be the last time I change mufflers! Are these the same bullets that come on the true duels from kooks? Anyone have a sound clip. I'll post a before and after video once installed. Should be a couple weeks