I had a "Flowmaster" duel muffler that was very noisy and annoying between 1900 and 2100 rpm, which is about 80 km/h, which is the speed I normally drive. I swapped out the Flowmaster for this Magnaflow muffler and now it's nice to drive again, no rumble and I can have a decent conversation. FYI, this is for my Toyota X-Runner that I duel with. Mahalo.
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