Fastway - Ultra Silent Turn-Down Endcap Insert Options:PMB-01-0012 Engine Guard for BMW R9T

Engine Guard for BMW R9T /Pure/Scrambler

or for something more cost effective the Z-Frame is a great option

KN SU-5589

With the next generation of boundary breakers in mind

Fastway - Ultra Silent Turn-Down Endcap Insert Options:PMB-01-0012 Engine Guard for BMW R9TFastway Ultra Silent Turn Down End Cap Insert reduces sound levels with a reduction range of 4 6 decibels. Insert fits all new style, color anodized cone type Fastway Spark Arrestor End Caps. Decibel levels will vary depending on model, tuning, and exhaust system condition. Requires Fastway Spark Arrestor End Cap Will not work on dual exhaust Hondas or two stroke KTM models