This is a new OEM modified rear VSS(vehicle speed sensor) for footshift, ES and DCT models to correct speedometer and electronic shifting issues after installing a SECONDARY reduction. Primary reductions do not require this mod. The VSS is located on the top-left area of the rear crankcase cover.
**When checking out please add in the note what machine and what size secondary reduction you have as there are a few different variations and we can make sure you get the correct sensor height.