thanks for the replies, but this was over 2 years ago
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I went with prochambers at first, and it had a wicked sound. it kind of sounds like a mix of the x and h.
then I got bassani headers, and only bassani x matches, so that's what I have now. its sort of raspy at wot, but has a muscular sound at idle, and low revs. I can provide sound clips when I get home in about 6 hours.