FMF Racing Q4 Stainless Steel/Aluminum YFZ450'04-07 044210. Q4 S/S MFLR YFZ450 04-09/12-15. Developed over years of championship off-road racing. Max sound output 96db; most models below 93db.
Use with stock or FMF header. Not legal for use in California on pollution controlled vehicles, racing use only in California - waiver available. ATV/UTV - ATV / Atc.
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