Standard Ignition VVT521 Engine Variable Valve Timing (VVT) Sprocket - Exhaust

OE-Style Exhaust VVT Sprocket

Standard Ignition VVT521 is a direct-fit engine variable valve timing sprocket for the exhaust side. It is built to restore accurate cam timing, smooth rough idle, and recover lost horsepower and torque on supported GM applications.

For drivers and technicians servicing a Chevrolet Traverse, Buick Enclave, or Cadillac CTS, this exhaust VVT sprocket is engineered to match OE tooth profiles and help maintain quiet operation.

Key Features

• Engine variable valve timing sprocket for exhaust-side applications
• Precision-machined for accurate variable valve timing control
• OE-matching sprocket tooth profile for quieter operation
• Designed to reduce leakage and lash for improved drivability
• 100% end-of-line tested to meet or exceed OE performance
• OE-style installation bolt included where applicable

Detailed Description

The Standard Ignition VVT521 is an OE replacement exhaust VVT sprocket designed to restore timing accuracy in engines that rely on variable valve timing for performance and efficiency. By helping correct cam phasing, it can improve throttle response, reduce emissions, and bring back the power curve expected from the original engine calibration. This part is a practical choice for GM vehicles that need a precise replacement, including Chevrolet Traverse, Buick Enclave, and Cadillac CTS applications.

This part cross-references Dorman OE Solutions 917-274 and Gates VCP802 for the same application.

Common Issues This Part Can Help Address

• Rough idle caused by worn or inaccurate VVT timing control
• Reduced engine power or torque from cam timing drift
• Excessive noise from worn sprocket tooth profiles or lash
• Higher emissions from inconsistent valve timing
• Poor drivability related to delayed or incorrect exhaust cam response

Installation Notes and Tips

Verify the engine code, model year, and exhaust-side application before installation. This VVT sprocket is listed for a wide range of GM vehicles from 2007-2022, including multiple Chevrolet, Buick, Cadillac, GMC, Saturn, and Pontiac models. Follow OE service procedures for cam timing alignment and torque specifications, and replace related timing components if inspection shows wear.

Quality Assurance

Standard Ignition subjects this VVT component to 100% end-of-line testing to help ensure OE-level performance and consistent operation. The part is precision-machined for accurate timing control and built to meet the demands of modern variable valve timing systems.