Standard Ignition VVT571 Engine Variable Valve Timing (VVT) Sprocket - Intake (Left)

Overview of Standard Ignition VVT571 Engine Variable Valve Timing Sprocket

The Standard Ignition VVT571 is a precision-engineered engine variable valve timing (VVT) sprocket designed for select Subaru models. This crankshaft gear component ensures accurate timing control for optimal engine performance in vehicles like the Subaru Forester, Outback, and WRX STI.

• Engine variable valve timing sprocket for precise timing control
• Durable metal gear construction for long-lasting performance
• Crankshaft gear type with 48 teeth and 4 timing marks
• Inside diameter of 1.24 inches (31.496 mm) and outside diameter of 5.05 inches (128.27 mm)
• Thickness and tooth width of 1.71 inches (43.434 mm)
• Single mounting hole with a lug hole diameter of 0.48 inches (12.192 mm)
• Non-adjustable design without keyway notch

Detailed Product Description

The Standard Ignition VVT571 sprocket is crafted from metal to provide reliable durability and consistent performance in the valve train system. This crankshaft gear type sprocket features 48 teeth and 4 timing marks, which are critical for maintaining precise engine variable valve timing. With an inside diameter of 1.24 inches and an outside diameter of 5.05 inches, it fits securely on the crankshaft of compatible Subaru engines. The sprocket’s thickness and tooth width of 1.71 inches ensure proper engagement with the timing chain, contributing to smooth engine operation.

Designed specifically for Subaru models including the Baja, Forester, Impreza, Legacy, Outback, and WRX STI, the VVT571 part number matches exact OEM specifications. This ensures compatibility and helps maintain factory performance standards without the need for adjustments or additional hardware, as no mounting hardware is included.

Common Applications and Issues Addressed

• Restores proper variable valve timing function in Subaru engines
• Resolves timing chain slippage or misalignment problems
• Eliminates engine performance issues related to worn or damaged sprockets
• Prevents rough idling and poor fuel efficiency caused by timing errors
• Supports smooth engine start-up and acceleration response

Installation Notes and Tips

• Ensure engine is cool and battery disconnected before installation
• Verify compatibility with Subaru model and engine year prior to replacement
• Use proper tools to remove the old sprocket and install the VVT571 securely
• Check timing marks alignment carefully to maintain correct valve timing
• Consult vehicle service manual for torque specifications and detailed procedures

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM standards, providing reliable fit and function. The VVT571 sprocket undergoes rigorous quality control to ensure durability and performance in demanding engine environments. While specific warranty details may vary, Standard Ignition typically offers coverage against defects in material and workmanship to support customer confidence in their purchase.