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Hooker Headers 12644

Hooker Headers LS Engine Mounts for 1978-88 Malibu/Cutlass/Regal/Monte Carlo

Hooker Headers 12644

520-12644

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Hooker Headers 12644 Hooker Headers LS Engine Mounts for 1978-88 Malibu/Cutlass/Regal/Monte Carlo $256.95
Transmission Crossmember for LS Engine Swap
  • 1978-88 Malibu / Monte Carlo / El Camino* / Cutlass / Grand Prix / Regal / Bonneville
  • 4L60/4L80/TH400/2004R/T56/T56 Magnum

  • Hooker Headers 12644 Details

    Trans Crossmember

    Important Installation Notes:
  • Integral component of the complete Hooker swap system for this application. Component features unique geometry that is not compatible for use with any other brand of engine mounting components. 4L60 applications require add on bracket p/n 520- 12655. 4L80 applications require add-on bracket p/n 520-12656. For applications that were NOT originally equipped with a 200-4R transmission, crossmember adapter p/n 520-12647 is required. Crossmember fitment has not been validated for El Camino applications.

  • Specifications:

    Manufacturer's Part Number:
    12644HKR

    These crossmembers are part of the most comprehensively engineered LS swap system of mounting components, headers and exhaust systems available for these applications. The entire Hooker swap system is designed to decrease your total swap installation effort and cost while increasing the engineered quality of your vehicle and compatibility of these components with other popular aftermarket components.
    These crossmembers have been CAD designed and FEA validated to provide excellent structural strength and stiffness from its high-strength low-alloy steel construction. As a further benefit to the user, a maximized ground clearance pathway for routing 2-1/2'' or 3'' exhaust system tubing is included as a main design feature.
    Due to its unique design geometry, this crossmember must be installed in conjunction with Hooker/Holley 1978-88 Malibu / Monte Carlo / El Camino* / Cutlass / Grand Prix / Regal / Bonneville (A/G-body) LS swap engine mounting brackets (p/n 520-12643) to provide proper driveline operation angles and allow installation of an LS engine and one of the above listed GM/Tremec transmissions into this application without requiring any cutting or hammering to the vehicle body.
    The related Hooker engine mounting brackets work in conjunction with this crossmember to provide an optimized 3° to 3.5° engine/transmission inclination angle that is critical to providing the minimized U-joint working angles that are desired for lowered performance and competition vehicles.
    The installed geometry of this crossmember and the compatible Hooker engine mounting brackets are utilized to align the engine crankshaft and transmission output shaft axis with the center line of the chassis, which is slightly modified from the just-off-center stock alignment geometry used by GM. Use of any non-Hooker brand engine mount, transmission crossmember or headers will have adverse effects on the ease of installation, component clearance, ground clearance and engine inclination angle (3° with Hooker engine mounts and transmission crossmembers) you can expect from your installation. With these components installed, your driveline will be purposely configured with compound U-joint angles, due to the chassis-centered alignment of your engine/transmission and the stock pinion offset of your rear differential.

    Important Application and Installation Note
    These headers were specifically designed for compatibility with:
  • Hooker Headers LS Engine Swap Headers for 1978-88 Malibu/Cutlass/Regal/Monte Carlo
  • Hooker Headers LS swap engine mounting brackets (p/n 520-12643)
  • Hooker Headers exhaust systems (p/n 520-42511 or 520-42512)
  • Holley LS oil pan (p/n 510-302-2)
    Using ANY components other than what is listed here will result in misalignment and interference issues with these Hooker and Holley components.

    Features
  • Due to its unique design geometry, this crossmember MUST be installed in conjunction with Hooker 1978-88 A/G-body LS swap engine mounting brackets p/n 520-12643 to provide proper driveline operation angles and to allow installation of an LS engine and one of the above listed GM automatic transmissions into this application without requiring any cutting or hammering to the vehicle body.
  • Facilitates installation of a 4L60/4L80/TH400/2004R/T56/T56 Magnum behind an LS engine in 1978-88 GM A/G Body applications (may require add-on bracket, see installation notes)
  • High-strength low-alloy steel construction
  • Provides a engineered 3 to 3.5 degree engine/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker A/G-body LS engine swap brackets
  • Provides the highest clearance available for up to 3'' exhaust system routing

    *Click Here to see the 1978-88 A/G-Body LS Swap Selection Guide

  • Does Hooker Headers 12644 fit your vehicle?

    Narrow Results

    1980 OLDSMOBILE CUTLASS SUPREME

    • Liter: 4.3
    • SubModel: BROUGHAM
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1981 PONTIAC GRAND PRIX

    • Liter: 5.7
    • SubModel: LJ
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980-1981 OLDSMOBILE CUTLASS

    • Liter: 4.3
    • SubModel: BROUGHAM
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1978-1979 PONTIAC GRAND PRIX

    • Liter: 5.0
    • SubModel: SJ
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1985-1986 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: HOLIDAY

    1980-1981 OLDSMOBILE CUTLASS SUPREME

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1980 OLDSMOBILE CUTLASS

    • CC: 3800
    • Liter: 3.8
    • SubModel: LS
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1981 PONTIAC GRAND PRIX

    • Liter: 4.3
    • SubModel: BROUGHAM
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1979 CHEVROLET MONTE CARLO

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1981 OLDSMOBILE CUTLASS SUPREME

    • EngineType: ALL
    • SubModel: LS

    1981 OLDSMOBILE CUTLASS

    • Liter: 4.3
    • SubModel: LS
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1987 CHEVROLET EL CAMINO

    • Liter: 4.3
    • Aspiration: N
    • SubModel: SS
    • Engine Vin: Z
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1981 OLDSMOBILE CUTLASS SUPREME

    • Liter: 4.3
    • SubModel: BROUGHAM
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1981 PONTIAC GRAND PRIX

    • CC: 3800
    • Liter: 3.8
    • SubModel: LJ
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1980 CHEVROLET MONTE CARLO

    • Liter: 3.8
    • SubModel: SPORT
    • CUI: 229
    • EngineType: V6 ( 3.8 L / 229 )

    1980-1981 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1978-1979 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: ALL

    1978-1980 OLDSMOBILE CUTLASS SALON

    • EngineType: ALL
    • SubModel: ALL

    1980-1981 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.7
    • SubModel: BROUGHAM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1978 PONTIAC GRAND PRIX

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1987 OLDSMOBILE CUTLASS CRUISER

    • EngineType: ALL
    • SubModel: LS

    1979 PONTIAC GRAND PRIX

    • CC: 3800
    • Liter: 3.8
    • SubModel: LJ
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1984-1985 OLDSMOBILE CUTLASS CIERA

    • Liter: 2.8
    • SubModel: CRUISER
    • CUI: 173
    • EngineType: V6 ( 2.8 L / 173 )

    1981 CHEVROLET MONTE CARLO

    • Liter: 4.4
    • SubModel: BASE
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1983-1984 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: SS

    1980 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1979 PONTIAC GRAND PRIX

    • Liter: 3.8
    • SubModel: SJ
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1986-1987 CHEVROLET MONTE CARLO

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1987 OLDSMOBILE CUTLASS CRUISER

    • EngineType: ALL
    • SubModel: BROUGHAM

    1987 CHEVROLET EL CAMINO

    • EngineType: ALL
    • SubModel: BASE

    1979 CHEVROLET MONTE CARLO

    • Liter: 4.4
    • SubModel: BASE
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1979 CHEVROLET MONTE CARLO

    • Liter: 3.3
    • SubModel: BASE
    • CUI: 200
    • EngineType: V6 ( 3.3 L / 200 )

    1985-1987 OLDSMOBILE CUTLASS SALON

    • EngineType: ALL
    • SubModel: ALL

    1981 PONTIAC GRAND PRIX

    • CC: 3800
    • Liter: 3.8
    • SubModel: BROUGHAM
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1985-1987 CHEVROLET MONTE CARLO

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1978-1987 BUICK REGAL

    • EngineType: ALL
    • SubModel: ALL

    1980 OLDSMOBILE CUTLASS

    • Liter: 4.3
    • SubModel: LS
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1981-1984 CHEVROLET MONTE CARLO

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1980-1981 OLDSMOBILE CUTLASS

    • CC: 3800
    • Liter: 3.8
    • SubModel: BROUGHAM
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1982-1983 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: ALL

    1980 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1987 CHEVROLET EL CAMINO

    • CC: 5031
    • Liter: 5.0
    • SubModel: SS
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1981 PONTIAC GRAND PRIX

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1981 PONTIAC GRAND PRIX

    • Liter: 4.4
    • SubModel: LJ
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1985-1987 CHEVROLET MONTE CARLO

    • Liter: 5.0
    • SubModel: SS
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.7
    • SubModel: BROUGHAM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1984-1987 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: BROUGHAM

    1985-1987 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: GT

    1981 PONTIAC GRAND PRIX

    • Liter: 4.3
    • SubModel: LJ
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1979 PONTIAC GRAND PRIX

    • EngineType: ALL
    • SubModel: BASE

    1978-1979 PONTIAC GRAND PRIX

    • Liter: 5.0
    • SubModel: LJ
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1980-1981 OLDSMOBILE CUTLASS SUPREME

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1984-1985 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: CRUISER LS

    1981 OLDSMOBILE CUTLASS

    • CC: 3800
    • Liter: 3.8
    • SubModel: LS
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1978 PONTIAC GRAND PRIX

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980 OLDSMOBILE CUTLASS

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1980 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1982-1984 CHEVROLET MONTE CARLO

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1987 CHEVROLET MONTE CARLO

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1980-1981 OLDSMOBILE CUTLASS

    • Liter: 5.7
    • SubModel: LS
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1986-1987 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: SL

    1981-1984 CHEVROLET MONTE CARLO

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 229
    • EngineType: V6 ( 3.8 L / 229 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1978 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: SPORT

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • SubModel: LS
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1981 PONTIAC GRAND PRIX

    • Liter: 4.4
    • SubModel: BASE
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1980 OLDSMOBILE CUTLASS SUPREME

    • Liter: 5.7
    • SubModel: BROUGHAM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1982-1987 OLDSMOBILE CUTLASS SUPREME

    • EngineType: ALL
    • SubModel: ALL

    1978-1986 CHEVROLET EL CAMINO

    • EngineType: ALL
    • SubModel: ALL

    1981 OLDSMOBILE CUTLASS

    • Liter: 4.4
    • SubModel: LS
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1981 PONTIAC GRAND PRIX

    • Liter: 4.4
    • SubModel: BROUGHAM
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1986-1987 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: S

    1986-1987 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: LS

    1979 CHEVROLET MONTE CARLO

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1980 CHEVROLET MONTE CARLO

    • CC: 5031
    • Liter: 5.0
    • SubModel: SPORT
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1980-1981 OLDSMOBILE CUTLASS SUPREME

    • CC: 3800
    • Liter: 3.8
    • SubModel: BROUGHAM
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1981 PONTIAC GRAND PRIX

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981 PONTIAC GRAND PRIX

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1978-1979 PONTIAC GRAND PRIX

    • Liter: 4.9
    • SubModel: SJ
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1978-1979 PONTIAC GRAND PRIX

    • Liter: 4.9
    • SubModel: LJ
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1983 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: CL

    1980-1983 OLDSMOBILE CUTLASS CRUISER

    • EngineType: ALL
    • SubModel: ALL

    1980-1981 OLDSMOBILE CUTLASS

    • Liter: 5.7
    • SubModel: BROUGHAM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1987 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: SALON

    1981 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: SUPREME

    1980 PONTIAC GRAND PRIX

    • EngineType: ALL
    • SubModel: ALL

    1978 PONTIAC GRAND PRIX

    • CC: 3800
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1980 CHEVROLET MONTE CARLO

    • CC: 3800
    • Liter: 3.8
    • SubModel: SPORT
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1978-1979 OLDSMOBILE CUTLASS SUPREME

    • EngineType: ALL
    • SubModel: ALL

    1982-1987 PONTIAC GRAND PRIX

    • EngineType: ALL
    • SubModel: ALL

    1978-1981 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: LANDAU

    1980 CHEVROLET MONTE CARLO

    • Liter: 4.4
    • SubModel: SPORT
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1984-1987 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: LS

    1982-1983 CHEVROLET MONTE CARLO

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 260
    • EngineType: V6 ( 4.3 L / 260 )

    1981 OLDSMOBILE CUTLASS

    • Liter: 4.4
    • SubModel: BROUGHAM
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1985-1986 OLDSMOBILE CUTLASS CIERA

    • EngineType: ALL
    • SubModel: ES
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