MagnaFlow 4 in. x 14 in. Round Straight-Through Performance Exhaust Muffler 10415

This resonator helped the dual exhaust setup that I have on my 8th Gen Honda Accord v6 have that nice, smooth low rumble that I had been looking for. Pairing this with a high flow catalytic converter for those agressive RPMs.

Magnaflow on a Mini

The sound is great on my 2006 Mini Cooper S with a performance header

Deep tone little drone

Installed two of the 4 in. rounds on my 1967 Mustang. Nice throaty sound. Slight interior drone at around 50 mph, but then it goes away. When I step on the gas, it sounds the way a V8 should.