Industrial Injection 130lb Valve Spring Kit for 6.6L Duramax (2001–2016 LB7 / LLY / LBZ / LMM / LML)

Upgrade your Duramax valvetrain with the Industrial Injection 130lb Valve Spring Kit, engineered to handle higher boost pressures and increased RPM levels in performance-built 6.6L Duramax diesel engines. This complete valve spring kit helps prevent valve float under high boost conditions, allowing your engine to operate more efficiently while safely producing more horsepower and torque.

Designed for Duramax engines running over 45 PSI of boost and/or exceeding 3,200 RPM, this kit provides the strength and stability required for performance builds, towing applications, and high-horsepower diesel setups.

Each kit includes precision-matched conical valve springs, billet steel retainers, chromoly spring seats, and valve locks to ensure maximum durability, reliability, and valvetrain stability.

Whether you're building a competition Duramax, street performance truck, or heavy towing setup, the Industrial Injection 130lb valve springs deliver the valvetrain control needed to support higher boost levels and improved engine performance.

Key Features

• Helps prevent valve float in high boost Duramax engines

• Rated for up to 130 PSI boost/drive pressure

• Supports engine speeds up to 5,000 RPM

• Ideal for engines running 45+ PSI boost or over 3,200 RPM

• Complete Duramax valve spring upgrade kit

• Designed for high-performance diesel applications

Kit Includes

• 32 Conical Valve Springs

• 32 Billet Steel Retainers

• 32 Chromoly Spring Seats

• 64 Valve Locks

Duramax Fitment

Compatible with 2001–2016 GM 6.6L Duramax diesel engines, including:

• 2001–2004 LB7 Duramax

• 2004.5–2005 LLY Duramax

• 2006–2007 LBZ Duramax

• 2007.5–2010 LMM Duramax

• 2011–2016 LML Duramax

Why Upgrade Duramax Valve Springs?

Higher boost and increased engine speed can cause valve float, which reduces engine efficiency and can lead to serious valvetrain damage. Upgrading to 130lb performance valve springs improves valve control, allowing your Duramax engine to safely handle increased boost pressure and higher RPM levels.

The Industrial Injection Duramax valve spring kit (44B801) provides the strength and reliability needed for performance builds, helping your engine produce more power while maintaining valvetrain stability.