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Is the resonator very restrictive?, if not i'll just change the back box and
the down pipe, saving a few quid on the centre section.
Rob
When i had the downpipe decatted I asked Xtreme about the resonantor and they said don't bother it won't make any noticeable difference. Would be nice to know for sure though. I'm not bothered about extra power but a bit more noise wouldn't hurt