HOO12644HKR-1
1978-1988 GM A/G-Body LS swap 4L60//4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum Transmission Crossmember
OVERVIEW
1978-1988 GM A/G-Body LS swap 4L60//4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum Transmission Crossmember
Features:
- The LS Swap Crossmember for the GM G-Body has some very minor design updates & has been superseded from 12644HKR to part number 12644HKR-1
- 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" dual 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.
SPECS
Brand | Hooker BlackHeart |
---|---|
Color | Black |
Emission Code | 5 |
Finish | Black Powdercoated |
Material | Steel |
Motor Type | GM LS |
Product Type | Transmission Crossmember |
Transmission | 200R4 |
4L60E | |
4L65E | |
4L70E | |
4L75E | |
4L80E | |
4L85E | |
T56 GM | |
T56 Magnum GM | |
TH400 | |
Transmission Type | 4L60/4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum |
Type of Component | Crossmember |
UPC | 090127117194 |
Part Number | 12644HKR-1 |
Product title
Vendor
$19.99 CAD | $24.99 CAD
Product title
Vendor
$19.99 CAD | $24.99 CAD
Product title
Vendor
$19.99 CAD | $24.99 CAD
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