The L-4 pipe is narrow range and best suited for very fast
 circuits with minimal clutch use and few slow corners.
RLV "L" Series Yamaha and Piston Valve Pipes conform to 
all US technical standards as mandated by IKF, WKA and KART.
The L-4 pipe is narrow range and best suited for very fast
 circuits with minimal clutch use and few slow corners.
RLV "L" Series Yamaha and Piston Valve Pipes conform to 
all US technical standards as mandated by IKF, WKA and KART.
