FMF HEADER STN PBMB KX450F crank

FMF HEADER STN PBMB KX450F crank

• It uses FMF's patented module precisely located in the initial stage of the manifold
• The "bomb" increases productivity; horsepower increases by up to 10%
• It acts as a "pre-silencer", helping to reduce decibels
• The expansion and contraction of the exhaust gases through the system causes the flow rate to increase