My TYGA race cans make 105dB, and I seriously doubt you'll be able to get that noise down without killing the delivery. I keep meaning to make some adaptors so the standard cans will bolt onto the tyga chambers.

Mind you, after all the assurance that the standard pipes make great power, I'm gonna rebuild mine with the standard and see what happens.
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
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