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Hooker BlackHeart

Hooker BlackHeart Transmission Crossmember

1978-1988 GM A/G-Body LS swap 4L60//4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum Transmission Crossmember

Part # 12644HKR Be the first to write a review
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$309.95
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$345.00
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1978-1988 GM A/G-Body LS swap 4L60//4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum Transmission Crossmember

Features:

  • Facilitates installation of a 4L60/4L65/4L70/4L80/TH400/2004R/T56/T56 behind an LS engine in 78-88 GM A/G Body applications (may require add-on bracket, see installation notes)
  • Designed using CAD modeling/FEA analysis for optimal fitment, strength, weight, safety and appearance
  • Welded steel construction
  • Provides an optimized engine/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker 12643HKR engine mounts
  • Designed in conjunction with other Hooker BlackHeart GM A/G-Body engine swap brackets to provide bolt-in installation of Hooker LS swap manifolds, headers and exhaust systems for this application
  • Provides the highest clearance available for up to 3" exhaust system routing

About Hooker BlackHeart

The BlackHeart team utilizes the latest technology and materials to design exhaust systems, engine swap kits, and mufflers for both import and domestic cars and trucks. Hooker Blackheart is platform-engineered to provide superb performance, aesthetics, and fitment.

Brand Hooker BlackHeart
ColorBlack
Emission Code5
FinishBlack Powdercoated
MaterialSteel
Motor TypeGM LS
Product TypeCrossmember
Transmission200R4
4L60E
4L65E
4L70E
4L75E
4L80E
4L85E
T56 GM
T56 Magnum GM
TH400
Transmission Type4L60/4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum
Type of ComponentCrossmember
UPC090127712955
Part Number12644HKR
5

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

This part is fully interchangeable with part number 12644HKR-1. Integral component of the complete Hooker BlackHeart swap system for this application. Component features unique geometry that is not compatible for use with any other brand of engine mounting components. 4L60/4L65/4L70 transmissions require add on bracket P/N 12655HKR. 4L80 transmission require add-on bracket P/N 12656HKR For applications that were NOT originally equipped with a 200-4R transmission, crossmember adapter P/N 12647HKR is required. Crossmember fitment has not been validated for El Camino applications. *NOT COMPATIBLE WITH TREMEC TR6060 TRANSMISSIONS. TH350 Transmissions can reuse the factory transmission crossmember, but the slots in the center of the crossmember will need to be elongated in the forward direction.
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