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Scat Stroker Kit - 9.6:1 (87-90 4.2L Jeep Wrangler YJ)

Market Price $1,808.99 You Save 12% ($209.00)
Our Price

$1,599.99 (kit)

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  • Item J101237
  • MPN# 1-96005BI-125

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Ship to: Ashburn - 20149
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    Features & Details

    • Premium Stroker Kit
    • Boring Required from 3.75" to 3.905" to Accomodate Larger Pistons
    • 9.6:1 Compression Ratio
    • Upgrades Your 258 CI to 280 CI
    • Internal Balanced
    • Forged Pistons
    • Retains 3.895" Crank Stroke
    • Increases Power with Greater HP Gains
    • Polished and Ground to Exact Tolerances
    • Doweled Caps for Perfect Alignment
    • Sized to the Tightest Possible Spec
    • Precision Honed with Diamond Tooling
    • Rods Feature 2 Piece Chromoly Steel Forging
    • 3/8" Cap Screws
    • Made with ARP Bolts
    • For Use on 1987-1990 4.2L YJ Inline 6 Cylinder Engines
    Premium Power. Looking for more power from your 4.2L YJ? Scat's 9.6:1 Stroker kit is just what you need for a more engaging drive. This rotating assembly is complete and internally balanced to retain stock stroke. This rotating assembly with overbore pistons will give you a smooth ride.

    Durable Construction. Scat takes great care and is dedicated to making sure their balanced assemblies are sized to the tightest possible specification. This high quality kit is comprised of 2 piece chromoly steel forged rods with 3/8" cap screw ARB bolts for the most reliable fit and are precision honed with diamond tooling for exact tolerances. Dowel capped pistons for precise alignment, a ground and polished crankshaft and all required oil rings are included for a fully complete kit to upgrade your YJ to a new level of power.

    Installation. Upgrading with a stroker kit is an intense process, requiring full tear down of your engine's rotating assembly. We recommend you have an experienced, professional mechanic install this kit. This stroker kit is internally balanced and does require boring from 3.75" to 3.905" to accommodate the larger pistons.

    Application. This 9.6:1 Scat Stoker Kit is designed for use on 1987-1990 4.2L Jeep Wrangler YJ models.

    Fitment: 1987 1988 1989 1990 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • Crankshaft
    • Pistons
    • Connecting rods
    • Rings
    • Bearings
    Installation Info
    Will it fit my Wrangler?

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    Questions & Answers (2)

    2 Top Rated Questions

    Will this kit work on a 1974 AMC 258 4.2L Project vehicle is a 1974 International Scout ll

    • At this time the Scat Stroker Kit - 9.6:1 is confirmed to fit 87-90 Wrangler 4.2L YJs only. We would suggest contacting SCAT directly for parts on your International Scout II.

    Helpful (0)

    How does this kit get you from 258 CI to 280 CI but yet doesn't need boring and retains stock stroke?? If you don't change either of those variables then its still a 258!!

    • The Scat Stroker Kit is will require you boring the engine out to a 3.905". Stroke will remain the same.

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