If I was to choose again, Id go for a valved Remus backbox or similar. Its a bit cheaper too.
MPE while pretty good sounding (after about 4k KM it settled very nicely imo), on long motorway journeys it drones a bit between 1k - 2k RPM. I assume its because MPE for m140 doesnt have a valve for some reason. I dont mind it as I do 1 or 2 such journeys a year but its still a bit annoying.
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