Melling Hi-Perf Adjustable Timing Chain & Gear Set

2005–2010 Chrysler / Dodge / Jeep / Ram 5.7L Hemi / 6.1L SRT8

Part #: 40540

Overview

The Melling Hi-Perf Adjustable Timing Chain and Gear Set is a precision-engineered solution designed for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 5.7L Hemi and 6.1L SRT8 engines from 2005 to 2010. This high-performance three-piece kit provides enthusiasts and professional engine builders with the ability to fine-tune camshaft timing for improved engine response and power delivery. Built to work exclusively with Melling oil pumps, this set ensures a perfect fit and enhanced durability compared to OEM components.

Ideal for engine rebuilds, performance upgrades, and custom tuning applications, the adjustable timing gear allows up to 6 degrees of advance and 4 degrees of retard, giving tuners the flexibility to optimize valve timing for maximum efficiency and power.

Key Features

This timing chain and gear set combines advanced materials and precision manufacturing to deliver reliable, long-lasting performance. Key features include:

• Complete three-piece set: timing chain, adjustable billet steel crankshaft sprocket, and stainless steel camshaft sprocket
• Induction heat-treated 6-keyway billet steel crankshaft sprocket for precise timing adjustments
• Heavy-duty silent timing chain engineered for smooth, quiet operation and enhanced durability
• Robust timing chain tensioner to maintain optimal chain tension under high-stress conditions
• Corrosion-resistant stainless steel camshaft sprocket with adjustable timing range
• Adjustable camshaft sprocket allowing up to 6° advance and 4° retard for custom tuning
• Exclusive compatibility with Melling oil pumps; crankshaft sprocket does not fit OEM oil pumps
• Manufactured to meet or exceed OEM quality standards using performance-grade materials

Construction & Design

The Melling timing chain and gear set is built for strength and precision. The crankshaft sprocket is crafted from billet steel and undergoes induction heat treatment to enhance wear resistance and durability. The camshaft sprocket is made from stainless steel, providing excellent corrosion resistance and a long service life. The silent timing chain is designed to reduce noise and vibration while maintaining robust performance under demanding engine conditions. A heavy-duty tensioner ensures consistent chain tension, preventing slack and timing inaccuracies during operation.

Each component is engineered to work seamlessly together, delivering reliable timing accuracy essential for high-performance engines and rebuilds. The adjustable sprocket design enables fine cam timing adjustments to optimize engine output and efficiency.

Installation & Fitment

This timing chain and gear set fits a wide range of Chrysler, Dodge, Jeep, and Ram models from 2005 through 2010 equipped with 5.7L Hemi and 6.1L SRT8 engines. It requires removal of the existing timing components and oil pump, as the crankshaft sprocket is designed exclusively for use with Melling oil pumps and will not fit OEM units. Proper installation is critical to ensure precise timing control and reliable engine operation.

Professional installation is highly recommended to correctly set timing adjustments and avoid potential engine damage. The adjustable sprocket allows custom cam timing settings that should be calibrated according to specific engine build requirements.

What's Included

• Adjustable billet steel crankshaft sprocket (6-keyway, induction heat treated)
• Stainless steel camshaft sprocket with adjustable timing range
• Heavy-duty silent timing chain
• Heavy-duty timing chain tensioner

Ideal For

This Melling Hi-Perf Adjustable Timing Chain and Gear Set is perfect for engine builders, performance enthusiasts, and professional mechanics working on Chrysler, Dodge, Jeep, and Ram vehicles with 5.7L Hemi or 6.1L SRT8 engines. It is especially suited for those performing engine rebuilds, upgrades, or seeking to optimize camshaft timing for enhanced power, throttle response, and efficiency. The adjustable timing feature makes it an invaluable component for custom engine tuning and high-performance applications.

Fitment Details

• 2005–2008 Chrysler 300 5.7L
• 2005–2010 Chrysler 300 6.1L
• 2008–2010 Dodge Challenger 6.1L
• 2006–2008 Dodge Charger 5.7L
• 2006–2010 Dodge Charger 6.1L
• 2005–2008 Dodge Durango 5.7L
• 2005–2008 Dodge Magnum 5.7L
• 2006–2008 Dodge Magnum 6.1L
• 2003–2008 Dodge Ram 1500 5.7L
• 2003–2008 Dodge Ram 2500 5.7L
• 2004–2008 Dodge Ram 3500 5.7L
• 2006–2008 Jeep Commander 5.7L
• 2005–2008 Jeep Grand Cherokee 5.7L
• 2006–2010 Jeep Grand Cherokee 6.1L

Melling is an engine-parts manufacturer best known in performance circles for oil pumps, camshafts, and valvetrain/timing components. Their performance line focuses on parts that support stable oiling and durability—key foundations for high-RPM and high-load builds where lubrication and valvetrain control are critical.