Product Summary

267, 283, 305, 327, 350, Internal Engine Balance

    Key Specs

    MFG. Part #80-2125S
    Input Spline Quantity26
    Clutch Diameter10.5"
    Friction MaterialOrganic
    Disc StyleFull face

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    Ram Clutches 80-2125S Details

    Force 10.5 Dual Disc

    RAM’s storied history of building single and dual disc clutches for real race cars led to the design and production of the RAM Concept 10.5 dual disc clutch system. The Force 10.5 features an integral steel or aluminum flywheel, properly balanced for your engine out of the box, as the basis for the clutch system. We then add the features listed below to surpass other clutch market designs, such as:

    • Size – the larger the diameter the more the holding power the clutch system will have. The 10.5 pressure plate has 2400 pounds of clamp pressure, where competitor’s 9.5 assemblies typically have 1800 pounds of clamping force. The larger clutch diameter will also further enhance heat dissipation over the smaller units. Stock pedal effort is maintained with the Force 10.5 unit.
    • Precision machined billet flywheel provides a stable mounting platform. Each unit is set up on the flywheel before shipping to insure proper release once the clutch is installed. A specification card is provided with each unit to aid you in setting up the clutch properly in the car.
    • Precision balance on the flywheel insures proper balance and vibration free driving. Match balancing available by special order.
    • Strap driven floater plate system assures quiet, no-rattle operation.
    • Utilization of a sprung hub top disc to ease stress on the driveline during initial engagement. Dual solid hub designs are aggressive and more susceptible to gear noise in the transmission.
    • The Force 10.5 is available for most any engine platform and in most cases, are a direct bolt in replacement for the factory clutch.
    • Available with 300 Series organic friction material for a super-smooth engagement on the street and holding power up to 750 HP.  A 900 Series metallic version is available for extreme duty/competition and is capable of holding in excess of 1000 horsepower. Like any clutch system, the horsepower capacity is dependent on the load factors we outline below.

    As with any dual disc clutch, it’s important to make sure the Force 10.5 will properly fit within the constraints of your engine/transmission combination before installing. Our detailed instruction sheet guides you through this process to avoid any surprises BEFORE you complete the installation.

    What load factors should you consider in choosing between the 300 series organic or 900 series metallic friction materials? Take into account all of the standard factors that will load the clutch system harder that you would for any clutch system selection:

    • Race or street use – in a nutshell – if you race it, use 900 series metallic for the best service life.
    • Low gear/rear end gearing – higher gearing (lower numerically) will load the system harder.
    • Tire selection – are the tires larger or sticky or more likely to spin?
    • Weight of the vehicle – the heavier the car, the more load the clutch will see. If it weighs over 4000 pounds, use 900 series.

    Want to review the instruction manual before you purchase? Click the link below to view the complete package.


    • Internal balance steel flywheel 168 tooth
    • 300 series sprung top disc
    • 300 Series solid center bottom disc
    • Strap driven floater plate
    • Quiet operation, no floater plate rattle
    • For applications up to 750 hp
    • Made in the USA


    Chevy 1-1/8-26 Spline 168 Tooth Flywheel Internal Balance


    Ram Clutches 80-2125S Specifications

    MFG. Part #80-2125S
    BrandRam Clutches
    Input Spline Quantity26
    Clutch Diameter10.5"
    Friction MaterialOrganic
    Disc StyleFull face
    Flywheel IncludedYes
    Tooth Count168-tooth
    Hardware IncludedYes
    GTIN Code809009432153
    NotesFlywheel bolts are not included.
    Engine BalanceInternal
    Input Shaft Diameter1.125"
    Hub StyleSprung/Unsprung
    Pressure Plate StyleDiaphragm
    Throwout Bearing IncludedNo
    Alignment Tool IncludedNo
    Pilot Bushing IncludedNo
    Flywheel MaterialBillet steel
    Counterweight AssistNo
    Sold in QuantityKit