Product Summary

Universal Fit, 10 Input Spline Quantity, 1.1 SFI Rating

    Comes as a Kit

    Key Specs

    MFG. Part #91604082
    BrandSpeedway Motors

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    Speedway Motors 91604082 Details

    Are you swapping in a modern LS engine but also using the classic GM 4-speed manual transmission? This kit has the components you need to combine the two.  Featuring an OER bellhousing modeled after the famous "621" it is designed to bolt to Gen III LS Engines.  This kit has the bellhousing, clutch, flywheel, and hardware to connect the LS engine to an original 4-speed Saginaw, Muncie, or Borg-Warner transmission. 


    OER LS 4-Speed Aluminum Bellhousing

    • OER's bellhousing is modeled after the famous "621" and designed to bolt to Gen III LS-engines. Made from CNC machined heavy cast aluminum, heat-treated and reinforced with extensive thick webbing, this is one of the strongest cast aluminum bellhousings available.

    Speedmaster 168 Tooth Billet Flywheel

    • SFI-Rated Flywheels are engineered to handle extreme duty applications and designed to take the punishment of todays high horsepower engines.
    • 168 tooth
    • SFI 1.1 certified

    Speedway 11 Inch 10 Spline Clutch

    ICT Billet Bellhousing Bolts

    • All ICT Billet metric flange bolts are custom made for us, right here in the USA!! Grade 10.9, JIS head
    • 35mm length
    • 10mm x 1.5 thread size
    • 1.75 under head length

    ARP Chevy Gen III/LS Flywheel Bolts

    • Exclusive, flat, 12-point head design
    • Larger than stock shank diameter for increased strength and improved flywheel register
    • Has a 200,000 psi rating
    • M11 x 1.5
    • .880" under head length

    ARP LS Pressure Plate Bolts

    • Made from a premium grade chromoly, complete with washers
    • Hardened to a nominal tensile strength of 180,000 psi
    • Large diameter, low-profile design
    • 10mm x 1.5 Thread

    Kit Includes:

    • (1) 91062113 OER LS 4-Speed Aluminum Bellhousing, 621 Style 
    • (1) 101330282 Speedmaster 168 Tooth Billet Flywheel
    • (1) 89004505 11 Inch 10 Spline Clutch
    • (1) 826551652 ICT Billet Bellhousing Bolts, Set of 8
    • (1) 1013302802 ARP Chevy Gen III/LS Flywheel Bolts, Set of 6
    • (1) 1011342201 ARP LS Pressure Plate Bolts, Set of 6

    Speedway Motors 91604082 Specifications

    MFG. Part #91604082
    BrandSpeedway Motors
    Sold in QuantityKit
    Input Spline Quantity10
    Clutch Diameter11
    Flywheel IncludedYes
    Flywheel MaterialBillet steel
    Tooth Count168-tooth
    SFI Rating1.1
    Hardware IncludedYes