Industrial Injection 24G801 150 lb Valve Spring Set for 5.9L 12 Valve Cummins

The Industrial Injection 24G801 is a complete performance valve spring kit engineered for the 1989–1998 Dodge 5.9L 12 Valve Cummins engine. Recommended for builds pushing over 45 psi of boost and/or 3,200+ RPM, these heavy-duty springs are a critical upgrade for high-performance diesel applications.

Valve float is one of the most common failure points in a modified Cummins valvetrain. These 150 lb springs deliver increased seat pressure to keep valves firmly controlled at elevated boost and RPM levels, preventing float and allowing your engine to run more efficiently and make power safely.

Key Features:

• 150 lb seat pressure for enhanced valvetrain stability
• Rated for applications up to 4,500 RPM
• Recommended for engines running over 45 psi boost and/or 3,200+ RPM
• Includes both intake and exhaust valve springs — complete kit
• Also compatible with the 4BT Cummins
• Also sold under legacy part number DP12V.1

This kit includes springs for all intake and exhaust positions, making it a straightforward, complete valvetrain upgrade. For maximum performance, pairing with upgraded retainers and keepers is recommended when operating near the top of the RPM range.