Complete Idle Control Kit with Genuine GM LS1 Stepper Motor https://www.efihardware.com/products/2701/Complete-Idle-Control-Kit-with-Genuine-GM-LS1-Stepper-Motor
Use this for engines over 5.0L or 3.5+L with a large cam(s).
NOTE: This is a 4 Wire Stepper Motor. Please ensure your engine management system can control a 4 Wire Stepper Motor for engine idle speed control.