Our Specialties Valve Springs

Why Manton Valve Springs?

Manton valve springs are engineered to stabilize the entire valvetrain system by delivering the exact force required throughout the lift curve, rather than simply maximizing peak pressures. By combining purposeful geometries—such as beehive or conical designs—with premium ovate wire and precision shot peening, Manton effectively combats destructive spring surge. This holistic approach perfectly balances high performance with long-term durability to provide dependable control without generating unnecessary load, heat, or wear.

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  • 1989-98 5.9L 12 valve Cummins - Conical Valve Spring Kit

    1989-98 5.9L 12 valve Cummins - Conical Valve Spring Kit

    Includes :

    • Superior Conical Valve Springs

    • Billet Steel Valve Spring Retainers

    • Steel Valve Locks

    SKU: D-105-Kit-12v
    $436.55 USD

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    1989-98 5.9L 12 valve Cummins - Conical Valve Spring Kit

  • Manton's 2001 to Present 6.6L Duramax - Conical Valve Spring Kit

    Manton's 2001 to Present 6.6L Duramax - Conical Valve Spring Kit

    • 32 - Conical Valve Springs

    • 32 - Billet Valve Spring Retainers

    • 32 - Spring Cups

    • 64 - Valve Locks

    SKU: D-105-KIT-Dmax
    $727.58 USD

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    Manton's 2001 to Present 6.6L Duramax - Conical Valve Spring Kit

  • 1998-17 5.9L & 6.7L 24 Valve Cummins High Boost Conical Valve Spring Kit

    1998-17 5.9L & 6.7L 24 Valve Cummins High Boost Conical Valve Spring Kit

    • 24 - Conical Valve Springs

    • 24 - Billet Valve Spring Retainers

    • 48 - Valve Locks

    • 125 lbs @ 1.370" installed height

    • 190 lbs @ 0.920" lift

    SKU: D-105-KIT-24v-HB
    $576.25 USD

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    1998-17 5.9L & 6.7L 24 Valve Cummins High Boost Conical Valve Spring Kit

  • 2011 to Present 6.7L Powerstroke Upgrade Conical Valve Spring Set (Springs Only)

    2011 to Present 6.7L Powerstroke Upgrade Conical Valve Spring Set (Springs Only)

    • Conical Valve Spring ONLY

    • 133 LBS @ 1.333 Seat Pressure

    • 183 LBS @ .965. Open Pressure @ .420 Valve Lift

    • Max Valve Lift Accommodation of .420 in

    SKU: D-105-6.7SF
    $420.62 USD

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    2011 to Present 6.7L Powerstroke Upgrade Conical Valve Spring Set (Springs Only)

  • 1998-17 5.9L & 6.7L - 24 Valve Cummins Straight Valve Spring Economy Kit (Valve Springs Only)

    1998-17 5.9L & 6.7L - 24 Valve Cummins Straight Valve Spring Economy Kit (Valve Springs Only)

    • Straight Valve Spring ONLY

    • 110 LBS @ 1.340 Seat Pressure

    • 192LBS @ .920 Open Pressure @ .420 Valve Lift

    • Max Valve Lift Accommodation of .500

    SKU: D-105-24v-E
    $299.52 USD

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    1998-17 5.9L & 6.7L - 24 Valve Cummins Straight Valve Spring Economy Kit (Valve Springs Only)

  • 2003-07 6.0L & 2008-10 6.4L Powerstroke, High Boost Straight Valve Springs Set (Springs Only)

    2003-07 6.0L & 2008-10 6.4L Powerstroke, High Boost Straight Valve Springs Set (Springs Only)

    • Straight Valve Spring ONLY

    • 120 LBS @ 1.840 Seat Pressure

    • 284 LBS @ 1.340. Open Pressure @ .500 Valve Lift

    • Max Valve Lift Accommodation of .540 in

    SKU: D-105-6.0/6.4HB
    $359.98 USD

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    2003-07 6.0L & 2008-10 6.4L Powerstroke, High Boost Straight Valve Springs Set (Springs Only)

  • 2003-07 6.0L & 2008-10 6.4L Powerstroke Straight Valve Springs Set (Springs Only)

    2003-07 6.0L & 2008-10 6.4L Powerstroke Straight Valve Springs Set (Springs Only)

    • Straight Valve Spring ONLY

    • 94 LBS @ 1.840 Seat Pressure

    • 238 LBS @ 1.340. Open Pressure @ .500 Valve Lift

    • Max Valve Lift Accommodation of .500 in

    SKU: D-105-6.0/6.4
    $329.47 USD

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    2003-07 6.0L & 2008-10 6.4L Powerstroke Straight Valve Springs Set (Springs Only)

  • 1998-17 5.9L & 6.7L 24 Valve Cummins Conical Valve Spring Kit

    1998-17 5.9L & 6.7L 24 Valve Cummins Conical Valve Spring Kit

    • 24 - Conical Valve Springs

    • 24 - Billet Valve Spring Retainers

    • 48 - Valve Locks

    • 103 lbs @ 1.340" installed height

    • 176 lbs @ 0.920" open

    SKU: D-105-KIT-24v
    $523.86 USD

    View store information

    1998-17 5.9L & 6.7L 24 Valve Cummins Conical Valve Spring Kit