Our Ultra Silent insert further reduces sound levels with a reduction range of 3-6 decibels or more on some bikes.
The SILENT insert doesn't reduce the sound level but will redirect it and turn it away from the rider towards the ground.
Not compatible with two stroke end caps.
Sound levels at idle speed tested at 1' above and 1' behind each
muffler on the same 21' 500 EXCF tested back to back.
Stock muffler 82
Stock w Pro Moto end cap / ultra silent insert 85
Stock w Pro Moto end cap / silent insert 86
Stock w Pro Moto end cap 88
Graves Motorsports w db killer 85
Graves Motorsports 89
Fmf q4 84
Fmf 4.1 88
Fmf power core 88
Lexx w db killer 86
Lexx w spark arrestor insert 87
Lexx 89
Akropovic 85