This bracket is used with Centrifugal Specialties SB Ford/Windsor, BB Chevy and SB Chevy applications using 6.75" and 7"dampers, it is an Innovators West "replacement" 3/4-16 Crank Trigger Right Angle Curved Slide Bracket for Custom Crank Sensors. It is intended for use with passenger side configured 6.75″ to 7″ OD Dampers. This is a common add-on for those running Centrifugal Specialties X-6 and X-10 supercharger gear drives