View Full Version : Sound level output for 2 into 1 supermeg Harley

04-22-2011, 04:47 PM
Can anyone at Supertrapp show any supporting documents on the sound level in decibels cross referenced with the number of discs installed. I have 14 discs on a Road Glide and it definitely sounds quieter at idle.

Can anyone at Supertrapp show an Decibel numbers? I am sure there is a document somewhere. I could use this information should I get stopped for not having an original exhaust system.

04-25-2011, 07:29 AM
Our db numbers are based on SAE J2825 testing requirements on stock machines. There are no hard db numbers per added discs. Every machine is different. The db level can very from machine to machine and model to model with same exhaust. Throw in various other modifications, minor or major, and the db levels can vary greatly.