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Originally Posted by 24Dee
I don't see or understand how just a change in canisters can reduce db levels of the exhaust?
I've been in love with the sound of and have pleased with the gains of the HKS Hi-Power exhaust 60mm. But if I can gain more power while most importantly keeping the noise down just from a different design, then I will do it. My main concern here is that exhaust noise.
what's the difference in piping / resonator designs from the two exhausts you've had?
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Mufflers work by sound pressure absobtion/dissapation. N1 cans are thin and can't absorb/manage alot of pressure. A larger can will absorb/manage alot more pressure. Also, the 80mm has 33% more surface area in the core to absorb more pressure, which makes the 80mm quieter than the 60mm. The reason people say the 80mm is louder is that the bigger can makes the tone lower than the 60mm and the ear perceives lower tones at the same dBL as louder than the higher tone.