Chevy Duramax 6.6L 2005-2010 Fuel Rail Plug Valve M20x1.5 Stainless

The Chevy/GMC Duramax 6.6L fuel system benefits from a stable, precise fuel rail pressure, especially under hard driving conditions. This CNC-machined stainless steel Fuel Rail Plug Valve (M20x1.5) is designed to plug the pressure relief path to maintain consistent rail pressure, helping your engine deliver maximum output when it matters most. Built from durable stainless steel, it resists heat and corrosion in demanding environments, ensuring reliable performance across thousands of miles.

Designed for real-world use, this valve helps prevent fuel from being released back through the Pressure Relief Valve, reducing the likelihood of low fuel rail pressure diagnostics and related drivability concerns. The JT16SS plug provides a precise fit for Duramax 6.6L engines (2004.5–2010) and Dodge 6.7L Cummins (2007.5–2012), making it a practical upgrade for enthusiasts and mechanics looking to optimize fuel delivery and throttle response. Easy to install with standard tools, it supports your engine’s ability to produce its best power output in demanding situations.

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Benefits & Tips

• Maintain rail pressure under heavy load (towing, climbs, high-demand scenarios) to preserve power and throttle response.
• Reduce false low-rail-pressure DTC codes caused by insufficient pressure relief valve spring pressure, helping smooth engine operation.
• Quick, straightforward upgrade. Verify compatibility (Duramax 2004.5–2010 and Dodge Cummins 2007.5–2012) and ensure proper installation to maximize benefits.

Product specifications

• Model: JT16SS
• Thread size: M20x1.5
• Material: CNC-machined stainless steel
• Function: Fuel Rail Plug Valve (prevents fuel return via Pressure Relief Valve)
• Compatible engines: Chevy/GMC 6.6L Duramax (2004.5–2010); Dodge 6.7L Cummins (2007.5–2012)
• Type: Fuel Supply & Treatment
• Origin: Mainland China
• Weight: ~70 g
• Certifications: ISO9000
• Package includes: 1 x Plug

Package includes:

• 1 x Plug

Warnings / Reminders

• Compatibility: For Chevy/GMC 6.6L Duramax (2004.5–2010) and Dodge 6.7L Cummins (2007.5–2012). Verify engine application before purchase.
• Installation: Use appropriate sealing method and inspect for leaks after installation. Follow vehicle service guidelines and ensure a proper seal to prevent fuel leaks.