These ridges prevent the arm from unintentionally rotating relative to the base

Perfect complement to the side stand enlargement

bringing significant benefits for rider comfort

creating the necessary space for the protectors

GPR Exhaust - M3 Black Titanium Slip-On for Yamaha YZF R1-R1-M - 2015 to 2016 K-Type-Trailer Tires These ridges prevent the armGPR developed the M3 Black Titanium after the victories in the Moto3 World Championship. It has a removable racing grill, and a black titanium body with CNC machined bottoms. Its round shape has a diameter of 100mm. Product Features SOUND: Upgraded sound from stock exhaust. PERFORMANCE: Upgraded performance from stock exhaust QUALITY: Italian made with high grade welding WEIGHT: Lighter than stock exhaust Technical Specifications Shape: Round Body