•Optional Quiet Core insert will provide a decrease in sound level if desired
•Elliptical aluminum can offers strategic sizing for superior performance
•FMF’s exclusive cross-weave internal packing provides longevity and maximum sound dispersement
•Finally, the PowerCore 4 SA system is the new power standard via square inner-core technology; big weight savings over stock
•The PowerCore 4 SA system’s strategic ports allow the sonics to evacuate more effectively with the computer-designed Performance Flow end cap
•PowerCore 4 SA features a patented screen-type spark arrestor that is approved by the U.S.F.S. and does not interrupt exhaust flow so there’s no performance loss
•Computer designed and dyno tested for every 4-stroke application
•Standard Hi-Flo 2” end cap boosts all-around performance; optional smaller 1 3/4” end cap smooths power delivery; spark arrestor module adds off-road versatility
•Modular end cap allows easy tuning alterations
•Square or round (depending on the machine) perforated steel