Holley 543-111 Throttle Position SensorReplacement Service Part Part Number: 543 111 This Throttle Position Sensor fits all Terminator 4150 throttle bodies and Sniper EFI 4150 throttle bodies. Additionally, it is the replacement service part sensor for the following Holley P N's 502 9, 112 577, 112 578, 112 587, and 112 588. Features and Benefits Replacement service part For Terminator and Sniper EFI throttle bodies Can be used with other Holley EFI throttle bodies Black color