Product Summary

289, 302, 351W, Full Roller Rocker Arm Style, Chromoly

    Key Specs

    MFG. Part #1834-16
    Rocker Arm StyleFull Roller
    Rocker Arm Ratio1.7
    Stud Size0.437"
    Material TypeChromoly

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    COMP Cams 1834-16 Details

    COMP Cams Ultra Pro Magnum XD Roller Rocker Arms, 1.7 Ratio, 7/16" Stud Diameter for Small Block Ford.

    The next design evolution of the Hi-Tech Stainless Steel Roller Rocker Arms are built to outlast and outperform in accuracy and strength. The Ultra Pro Magnum XD Rocker Arms are engineered from durable 8650 steel and include a machined billet pushrod seat insert for a wide range of super accurate ratios. A unique and wide ratio range to fit almost any popular application. These XD rockers are fully rebuildable and boast precision-sorted needle bearings and hardened roller tips. And they work with most diameter springs and retainers. The new XD design utilizes advanced FEA and CAD design and development to improve strength, stiffness and MOI optimization for drag and circle track applications.

    • Machined billet pushrod seat insert for wide range of rocker ratios used in popular Chevy and Ford applications
    • 8650 Steel construction outlasts and outperforms other rockers in accuracy and strength
    • For applications with up to 1000 lbs. open spring pressure
    • Precision-sorted needle bearings and hardened roller tips better distribute the load and reduce wear
    • Engineered for use in circle track and drag race applications


    1977-92 Lincoln 302
    1964-93 Mercury 289-351
    1963-2001 Ford 289-351

    CARB Warning

    For race/ off road use only

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

    COMP Cams 1834-16 Specifications

    MFG. Part #1834-16
    BrandCOMP Cams
    Rocker Arm StyleFull Roller
    Rocker Arm Ratio1.7
    Stud Size0.437"
    Material TypeChromoly
    Rocker Arm Nut StylePolylock
    FinishBlack Oxide
    Sold in QuantitySet
    Rocker Arm Body StyleStandard
    Rocker Arm Mounting StyleStud
    Shims IncludedNo
    GTIN Code036584232858