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i honestly carnt see how they would improve performance theres not 2 cylinders plus i know exausts give more air which improve performance but only one silncer is needed plus on that r49 only goes into one actual exaust
so i would say just get a normal exause maybe a scarpian if you can get one for that bike or a technigas altough i belive they dont add much performance or theres the other poction of a gianelli everyone has one and likes them but there a little pricey around £114 or something like that
many thanks
Martin Day
the theory is you half the messurements of the pipe from the split section and use 2 chambers from that point.. so it splits the pulse in half and delivers 2 pulses back at slightly different timings. doesent work tho LOL