Blackheart LS Engine Swap Transmission Crossmember
InfoVehicle Info Needed
HOOKER HEADERSPART NUMBER: 520-12614

Blackheart LS Engine Swap Transmission Crossmember

$37395$415.95You Save$42.00
ShippingShips on Sep 04, 2026
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GM F-Body
Blackheart LS Engine Swap Transmission Crossmember
  • 1970-1981 GM F-Body
  • Fits: 4L60(multi-piece case only)/4L65/4L70/4L75 Transmission

     

    Installation Notes:

    • Facilitates installation of a 4L60(multi-piece case only)/4L65/4L70/4L75 GM automatic transmission behind an LS engine in any year 2nd-gen F-body
    • Designed using CAD modeling/FEA analysis for optimal fitment, strength, weight, safety and appearance
    • High-strength low-alloy steel construction
    • Provides an engineered 3 to 3.5 degree engine/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker 2nd-gen F-Body LS engine swap brackets
    • Designed in conjunction with Hooker 2nd-gen F-body LS engine swap brackets to provide bolt-in installation of Hooker LS swap manifolds, headers and exhaust systems for this application
    • Will install with either a stock rubber, or Prothane™ 7-1604 poly mount
    • Provides the highest clearance available for up to 3" exhaust system routing
    • Installation on 1975-81 subframes requires four horizontal holes to be drilled in subframe sidewall, no hole sawing or vertical drilling required
  • Part TypeTransmission Crossmember
    BrandHOOKER HEADERS
    Package Height6.5
    Package Width7.0
    Package Length36.0
    Weight15.985 PG
    Part CategoryPerformance Parts
    Engine TypeGM LS
    Transmission Mount IncludedNo
    Body TypeGM F Body
    Crossmember FinishBlack
    QuantitySold individually
    Part FitmentSemi Universal
    Crossmember MaterialSteel
    Vendor Part Number12614HKR
    Package Qty1
    Package TypeEA
    No Questions
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