throttle body 4 barrel low profile 46.5mm https://www.efihardware.com/products/1504/throttle-body-4-barrel-low-profile-46.5mm
1080 CFM Pro Race 4 Barrel Throttle Body features a special hi flow bell mouth and 46.5mm butterfies for extra flow.
Accepts GM stepper motor for Idle control - throttle body is supplied with blanking plate for stepper motor port.
Fits both spread bore and square bore manifolds.
NOTE: TPS, Cable Pulley and Stepper Motor are Optional and not supplied with this 4 Barrel Throttle Body.