Cummins 89-98 Heavy Duty Springs 89-98 Dodge 12v Conical springs. retainers and locks..

Features

• Improved Valvetrain Control : Reduce valve float and reversion, critical issues when boost and RPM levels rise.
• Power-Boosting Potential : Customers have reported 10–12 HP gains when switching from 60 lb springs to our beehives, thanks to consistent valve seal and reduced reversion.
• Higher Seat Pressure (155 lbs @ 1.880″) : Ensures valves won’t be forced open by intake or exhaust pressures, safeguarding against damage and power loss.
• Conical Shape for Stability : The latest spring design improves harmonic damping, leading to smoother, more reliable operation at higher RPM.

Specifications

• RPM Range : Perfect for builds up to 4,500 RPM with mild-to-moderate cam profiles and stock-size valves.
• Combat Valve Float & Reversion : Keep harmful exhaust gases out of the intake stroke, preserving combustion quality and maximizing power.

Fitment

• Cummins 89-98 12V

What's Included

• Upgrade your 12-valve Cummins valvetrain with our Conical Beehive Valve Springs , delivering 155 lbs of seat pressure to keep valves firmly under control up to 4,500rpm RPM or 65lbs of boost/drive pressure. This conical design offers enhanced stability for moderate cams and OEM-size valves , all the way up to 4,500 RPM .
• Retainers & Locks : Ready to install for most 12-valve Cummins configurations.
• Optional Locks : Increase your installed height by .075″ if needed for specific build requirements.