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I run the big cross flow muffler. A bit of drone on load at the 2500-3000rpm. Better with reduced exit cross section. No drone using it as a dual in single out but not ideal power wise in this configuration.
I’m sure there are others using a pair or four mufflers with decent results.
My understanding for getting zero drone is using reflective mufflers or reflective mufflers with absorption type following.
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