Proflow Throttle Position Sensor (TPS), For GM Chevrolet, 3-Pin - PFEQTBTPSPart Number: PFEQTBTPS Proflow's throttle position sensors are designed to bolt onto the throttle blade shaft and relay throttle opening closing information to the system ECU. These throttle position sensors are constructed from highly conductive, plastic resistance material with a sensitive rotator for accurate throttle position measurement. Replacement for Proflow's quad throttle body (PFEQTB1000) and Holley Terminator 4150 throttle bodies.