WSM Piston Kit - Standard - Yamaha 50-521P RS-16 E-Bike Seat Post The inter core tube is

The inter core tube is made of stainless that slips over the entrance and into the exit cap that is made of Titanium and accented with a Carbon fiber beauty cover with a 60* slash cut

Self cleaning mud grooves between each tooth prevent dirt build upand reduce chainwheel wear and weight

All installation hardware included

Force velocity stack with maximum flow and ease of installation

With open design you can have easy access for oil changes

WSM Piston Kit - Standard - Yamaha 50-521P RS-16 E-Bike Seat Post The inter core tube isNew light weight design incorporates shorter piston skirts with an PTFE coating at critical wear points for quicker revs and less heat Improved intake skirt with larger inlet ports for increased acceleration and overall performance