FMF Racing FMF Q Offroad Series Specs: FMF Q™ OFFROAD SERIES• U.S. Forestry legal spark arrestor muffler system will meet the93dB sound level set by the forestry service• The quietest 2-stroke legal performance spark arrestor made• Longer oval canister, uses internal technology that retainsoptimum flow characteristics, which are designed to enhancesound absorption qualities• Superior sound deadening characteristics and excellent power.The “Q” will help ensure that we stop noise pollution, notrob power