This part is fully interchangeable with part number 12644HKR.
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.
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 12655HKR - 4L60/65/70/75 Transmission Adapter 12656HKR - 4L80/85 Transmission Adapter BHS5181 - 10L80/10L90 Car Transmission Adapter - must be used with BHS5182 (for G-Body) BHS5182 - 6L80/90, 8L45/80/90, 10L80/90 Transmission Adapter BHS5183 - Tremec TKX 5-Speed Transmission AdapterProduct Description:
Transmission Crossmember Blackheart Bolt-On Steel Black Powder Coat GM LS-Series 4L60E / 4L65 / 4L70 / 4L80 / TH400 / T56 / T56 Magnum GM A-Body / G-Body 1978-88 Sold IndividuallyAt the HEART of any performance vehicle is the exhaust system. For decades, many of the most powerful vehicles on the planet have used Hooker Headers. To stay in front, we introduced the Blackheart line of Performance Exhaust Systems for popular late model vehicles. Utilizing the latest technology and materials to design exhaust systems, engine swap kits and mufflers for both Import and Domestic cars and trucks. From cylinder head flange to tailpipe, BlackHeart is engineered to provide maximum exhaust velocity, ground clearance, style, performance, and quality.
