Standard Ignition VVT551 Engine Variable Valve Timing (VVT) Sprocket - Exhaust

OE-Style Exhaust VVT Sprocket

Standard Ignition VVT551 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 Ford and Lincoln applications.

For Ford F-150, Ford Explorer, and Transit van service, this exhaust VVT sprocket is engineered for precise timing control and quiet operation.

Key Features

• Engine variable valve timing sprocket for exhaust cam applications
• Precision-machined for accurate variable valve timing
• OE-matching tooth profile for quiet operation
• Designed to reduce leakage and lash for stable performance
• 100% end-of-line tested for OE-level function
• OE-style installation bolt included where applicable

Detailed Description

Standard Ignition VVT551 is an OE replacement exhaust VVT sprocket that helps restore cam phasing accuracy on vehicles with variable valve timing systems. By controlling timing more precisely, it supports smoother idle quality, improved drivability, and better engine efficiency while helping reduce emissions. The sprocket tooth profile is matched to OE design to limit noise, and the internal design focuses on minimizing lash and leakage for consistent operation. This part cross-references Dorman OE Solutions 916-552 for the same application.

Compatible with 2011-2023 Ford Explorer, exhaust; 2011-2023 Ford F-150, exhaust; 2015-2026 Ford Transit-150, exhaust; 2015-2026 Ford Transit-250, exhaust; and 2015-2026 Ford Transit-350, exhaust. It also serves 2011-2017 Ford Mustang, exhaust, plus select Lincoln and Ford models including the MKX, MKT, MKS, MKZ, Navigator, Flex, Taurus, and Edge exhaust applications.

What It Helps Correct

• Rough or unstable idle caused by worn VVT hardware
• Loss of horsepower or torque from inaccurate cam timing
• Excessive valvetrain noise from lash or tooth-profile wear
• Reduced engine efficiency tied to timing control issues
• Emissions concerns related to poor variable valve timing operation

Installation Notes and Tips

Verify engine code, model year, and exhaust-side application before installation. Confirm the sprocket matches the original OE timing profile and follow factory timing procedures during service. Because variable valve timing components are timing-critical, inspect related chains, guides, and actuators for wear before reassembly.

Quality Assurance

Standard Ignition manufactures this VVT sprocket to meet or exceed OE performance expectations through precision machining and 100% end-of-line testing. The VVT551 is designed as a direct-fit replacement for supported Ford and Lincoln exhaust applications.