This is the latest and greatest from M4. Fully tunable 3x14" silencer with FIVE tunable inserts to adjust back pressure. Redesigned inlet and outlet for improved durability. Hi-Tech Continuous Roving Packing Material. Perfect for Stock or Modified Moto engines. Fits the RLV R4/R5 & RCE T3 pipes. Required at Infineon Kart track.
Tuning Inserts Included: 0.75", 0.83", 0.87", 0.9", 0.925"
Only available with 1.0" inlet.
Tunable Outlet. Simply remove the lock screw to replace the tuning inserts.