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Manton 5.9 24V Cummins Conical Valve Spring Kit (D-105-KIT-24v)
Upgrade your 5.9L 24-valve Cummins valvetrain with Manton’s complete Pressure Tower conical valve spring kit. This drop-in package delivers the seat pressure, valvetrain stability, and strength-to-weight advantages needed when running a performance cam, higher boost, or elevated RPM.
Manton’s exclusive conical “Pressure Tower” spring design pairs with ultra-light billet steel retainers to control the valves more effectively than stock cylindrical springs while reducing reciprocating mass. The result is better high-rpm stability, reduced valvetrain stress, and longer component life—whether the truck is a daily driver or a high-boost performance build.
Key Specs
- Seat pressure: 103 lbs @ 1.340″ installed height
- Open pressure: 176 lbs @ 0.920″ lift
- Maximum recommended valve lift: 0.420″ (at 1.340″ installed height)
- Optimized for applications up to approximately 75 psi boost
- Heat-treated spring shims included for fine-tuning seat pressure
Kit Contents
- (24) Conical valve springs
- (24) Ultra-light billet steel valve spring retainers
- (48) Valve locks
Fitment Notes
Designed for 5.9L 24-valve Cummins engines. Also commonly used on 6.7L 24-valve applications.
Important: Some 1998.5–2002 cylinder heads have tighter spring pockets. These may require machining with a valve spring pocket cutter (available separately from Manton) for proper clearance.
This is a complete, ready-to-install package from one of the most trusted names in diesel valvetrain components. Ideal when upgrading cams or increasing boost levels beyond stock.
Manton 5.9 24V Cummins Conical Valve Spring Kit (D-105-KIT-24v)
Upgrade your 5.9L 24-valve Cummins valvetrain with Manton’s complete Pressure Tower conical valve spring kit. This drop-in package delivers the seat pressure, valvetrain stability, and strength-to-weight advantages needed when running a performance cam, higher boost, or elevated RPM.
Manton’s exclusive conical “Pressure Tower” spring design pairs with ultra-light billet steel retainers to control the valves more effectively than stock cylindrical springs while reducing reciprocating mass. The result is better high-rpm stability, reduced valvetrain stress, and longer component life—whether the truck is a daily driver or a high-boost performance build.
Key Specs
Seat pressure: 103 lbs @ 1.340″ installed height
Open pressure: 176 lbs @ 0.920″ lift
Maximum recommended valve lift: 0.420″ (at 1.340″ installed height)
Optimized for applications up to approximately 75 psi boost
Heat-treated spring shims included for fine-tuning seat pressure
Kit Contents
(24) Conical valve springs
(24) Ultra-light billet ste[...]
Manton 5.9 24V Cummins Conical Valve Spring Kit (D-105-KIT-24v)
Upgrade your 5.9L 24-valve Cummins valvetrain with Manton’s complete Pressure Tower conical valve spring kit. This drop-in package delivers the seat pressure, valvetrain stability, and strength-to-weight advantages needed when running a performance cam, higher boost, or elevated RPM.
Manton’s exclusive conical “Pressure Tower” spring design pairs with ultra-light billet steel retainers to control the valves more effectively than stock cylindrical springs while reducing reciprocating mass. The result is better high-rpm stability, reduced valvetrain stress, and longer component life—whether the truck is a daily driver or a high-boost performance build.
Key Specs
- Seat pressure: 103 lbs @ 1.340″ installed height
- Open pressure: 176 lbs @ 0.920″ lift
- Maximum recommended valve lift: 0.420″ (at 1.340″ installed height)
- Optimized for applications up to approximately 75 psi boost
- Heat-treated spring shims included for fine-tuning seat pressure
Kit Contents
- (24) Conical valve springs
- (24) Ultra-light billet steel valve spring retainers
- (48) Valve locks
Fitment Notes
Designed for 5.9L 24-valve Cummins engines. Also commonly used on 6.7L 24-valve applications.
Important: Some 1998.5–2002 cylinder heads have tighter spring pockets. These may require machining with a valve spring pocket cutter (available separately from Manton) for proper clearance.
This is a complete, ready-to-install package from one of the most trusted names in diesel valvetrain components. Ideal when upgrading cams or increasing boost levels beyond stock.