Hooker Blackheart Transmission Crossmember Hoop

Gen III Hemi Swap Transmission Crossmember Hoop for 1966-1970 B-Body Mopar - Use with NAG1 or 8HP70 Transmission & Crossmember BHS532

Part # BHS539
In Stock
Free Shipping - Lower 48 US States
Your Price
Suggested Retail
Add to Wish List
Create a new list


Vehicle emissions regulations are not applicable to this item.

See Emissions Details
The Hooker Blackheart transmission crossmember hoop is part of the most comprehensive line of Gen III Hemi swap components available for the Mopar B-Body. The BHS539 Crossmember Hoop allows the installation of the popular, NAG1 5-speed or 8HP70 8-speed automatic transmission when used with the corresponding adaptor plate (sold separately). The BHS539 Transmission Crossmember Hoop replaces the very narrow factory Hoop on the original B-Body upper transmission crossmember allowing adequate clearance for drive shaft coupler and Speed sensor tone rings. The BHS539 transmission Crossmember Hoop is specifically designed to replace the factory hoop and when used in combination with the BHS532 transmission crossmember will provide a bolt in clearance solution with OE (Original Equipment) strength and durability with no need for any fabrication or welding.


  • Engineered Transmission Mount System Works together with Hooker Blackheart Engine Mounting Brackets, Transmission Crossmember, Long Tube Headers, and Exhaust Systems for an Easy Trouble Free Gen III Hemi Engine Swap in the 1966-1970 Mopar B-Body
  • Provides the Necessary Clearance Through the Upper Transmission Crossmember for the Drive Shaft Coupler and Speed Sensor Ring when Installing the NAG1 or 8HP70 Transmission
  • 1/2” Steel Upper Hoop Provides the Necessary Structural Integrity When Used in Combination with the BHS532 transmission Crossmember (no Welding Required)
  • No Cutting of the Transmission Tunnel Required
  • Accommodates Popular NAG1 or 8HP70 Transmission (Requires Transmission Specific Adaptor plate)
  • Uses the Factory Mounting Holes – For Easy Installation
  • Black Coated for Great Looks and Durability
  • Heavy Duty 3/16” and 1/2” Steel Construction for Strength and Durability
  • Includes Mounting Bolts & Instructions

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.

Application1966-1970 Mopar B-Body
Brand Hooker BlackHeart
Emission Code6
FinishBlack Paint
Motor TypeChrysler Gen III Hemi
Product TypeTransmission Crossmember Support
Type of ComponentTransmission Crossmember
Part NumberBHS539

Vehicle emissions regulations are not applicable to this item.
• Installation of the BHS539 Crossmember Hoop requires cutting out the OEM upper transmission Tunnel hoop and hammer massaging the transmission tunnel to provide additional space for the BHS539 to install into the transmission tunnel ( see installation Instructions 199R12041) • Requires the use of BHS532 Transmission Crossmember to maintain proper structural integrity of the vehicle.

*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.