Standard Ignition VVT591 Engine Variable Valve Timing (VVT) Sprocket - Intake

OE-Style VVT Sprocket for Intake Timing

Standard Ignition VVT591 is a direct-fit engine variable valve timing sprocket for the intake side. It is built to restore accurate cam timing, smooth rough idle, and recover lost horsepower and torque while helping reduce emissions and improve engine efficiency.

Fits 2008-2011 Chevrolet Aveo and Aveo5, intake; 2008 Chevrolet Astra, intake; 2008-2009 Saturn Astra, intake; 2009 Chevrolet Aveo, intake; 2009-2010 Pontiac G3, intake; and 2009 Pontiac G3 Wave, intake.

Key Features

• Engine Variable Valve Timing sprocket for intake applications
• Precision-machined for accurate VVT operation
• OE-matching sprocket tooth profile for quiet operation
• Designed to reduce leakage and lash for stable performance
• 100% end-of-line tested to meet or exceed OE performance targets
• Standard Ignition VVT591 is a direct-fit OE replacement

Detailed Description

Standard Ignition VVT591 is engineered as an OE replacement for vehicles that rely on intake-side variable valve timing control. By restoring proper cam phasing, this sprocket helps correct idle quality, improve drivability, and return the engine’s power delivery to a more consistent curve. The precision-machined construction and OE-style tooth profile support accurate timing and quieter operation, while the reduced-leakage, reduced-lash design helps maintain stable VVT response. This part cross-references Dorman - OE Solutions 918-182 for the same application.

What It Helps Fix

• Rough or unstable idle related to worn VVT hardware
• Loss of horsepower and torque from incorrect valve timing
• Emissions concerns caused by timing control issues
• Reduced fuel efficiency from inconsistent cam phasing
• Noise from excessive lash or worn sprocket tooth profiles

Installation Notes and Tips

Standard Ignition VVT591 is intended for intake-side installation on the listed Chevrolet, Pontiac, and Saturn applications. Verify engine code, timing components, and OE part match before installation. Follow factory service procedures for cam timing alignment, torque specifications, and final timing verification after installation. The OE-style installation bolt is included where applicable.

Quality Assurance

Each Standard Ignition VVT591 sprocket undergoes 100% end-of-line testing to help ensure OE-level performance and consistent operation. Standard Ignition’s VVT component line is built for broad aftermarket coverage and service-professional use.