07-S-001 Performance 12 Valve Springs

Features:

• 155 lbs seat pressure at 1.880” height
• Supports up to 4,500 RPM operation
• Handles up to 65 psi boost or drive
• Conical beehive design improves stability
• Reduces valve float and intake reversion
• Ideal for mild cams and stock valves
• Includes retainers and locks for installation
• Improves valvetrain control under load
• Boosts power and combustion consistency
• Designed for 1989–1998 12-valve Cummins
• Durable upgrade for street or competition use

Get More Power Without Losing Valvetrain Control

If you're still running stock valve springs on your 12-valve Cummins, you're leaving power and reliability on the table. The Hamilton Cams Performance Conical Beehive Valve Springs are a smart upgrade for anyone pushing more boost or higher RPM in their 1989-1998 Dodge Ram 2500 or 3500. With 155 pounds of seat pressure, these springs help keep your valves sealed tight under load, even up to 65 pounds of drive pressure. That means better combustion, less valve float, and fewer chances of performance-robbing reversion. The result? More consistent power delivery and smoother operation when you're towing, racing, or just enjoying a well-tuned diesel. Customers have even reported picking up horsepower gains just from swapping out old 60 pound springs. Plus, these come ready to drop in with retainers and locks included, making the install straightforward and garage-friendly.

Engineered For Boosted Builds And Higher RPM

The 07-S-001 valve springs from Hamilton Cams are built for the demands of modified 12-valve Cummins engines, specifically those running mild to moderate cams and stock-size valves. Their conical beehive design isn't just for looks, it reduces harmonics and adds spring stability at higher engine speeds, making them a solid choice for builds up to 4,500 RPM. The increased seat pressure of 155 pounds ensures the valves stay firmly closed under heavy boost and backpressure, preventing blow-by and power loss during combustion. These springs combat two major enemies of diesel performance: valve float and intake reversion, both of which can seriously affect engine efficiency and reliability. They’re especially useful in setups that see hard acceleration or sustained throttle, where traditional springs may struggle to keep up. Each set includes matching retainers and locks for easy installation and reliable performance. For builders who want precision control without jumping straight to dual springs, this is an ideal middle ground that delivers results.

Fitment: 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 Dodge RAM 2500/3500 Cummins

Notes:

• Designed for 1989-1998 12-valve Cummins engines
• Best suited for mild cams and stock valve sizes
• Supports up to 4,500 RPM reliably
• Handles up to 65 psi of boost or drive pressure
• Includes retainers and locks for easy installation
• Optional locks available to increase installed height by .075"
• Ideal for street and competition use
• Not recommended for cams over .360" lift
• Dual springs are suggested for higher lift or RPM setups
• Helps reduce valve float and exhaust reversion
• Improves combustion quality and engine reliability