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This adapter will allow you to use a GM 454 throttle body with the metripack connector when your TBI harness has the square small block Weather pack connector. It will also allow use of a LT1 Throttle body on a Tuned Port Injection (TPI) setup. Depending on the application, you may also need a Throttle Position Sensor (TPS) adapter. Please feel free to ask questions. p/n WTB001
