See, real world experience beats the testing. You claim that the Dynomax is quieter than the Magnaflow, yet 5.0 magazine claims Magnaflow is quieter.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.