SKU: 25010415048

1970-1974 2nd-gen F-body LS Swap Transmission Crossmember 12616HKR-1

Sale price$153.42 Regular price$170.47
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Description

1970-1974 2nd-gen F-body LS Swap Transmission Crossmember 12616HKR-1Revised Design specifically for T56 (GM 4th gen F body GTO versions only), T56 Magnum, 4L80E 4L85E, TH400 and 200R4 transmission installations. The revised design is easier to install since the feet are removable and can be installed separately. Features: Provides for direct installation of a T56 (GM F Body GTO LS versions only) or T56 Magnum transmission Provides for installation of a 4L80E, 4L85E, TH400 or 2004R transmission with the combined use of

Revised Design specifically for T56 (GM 4th-gen F-body/GTO versions only), T56 Magnum, 4L80E/4L85E, TH400 and 200R4 transmission installations. The revised design is easier to install since the feet are removable and can be installed separately.


Features:

  • Provides for direct installation of a T56 (GM F-Body/GTO LS versions only) or T56 Magnum transmission
  • Provides for installation of a 4L80E, 4L85E, TH400 or 2004R transmission with the combined use of a Hooker Blackheart 71223013HKR adapter or 12650HKR spacer block
  • Designed specifically for use with Hooker Blackheart 12512HKR and 12613HKR engine mounting brackets
  • CAD modeled design optimizes fitment and strength while minimizing weight
  • Built with powder coated steel construction for attractive, long-lasting durability
  • Designed to provide optimized U-joint working angles and exhaust system ground clearance
  • Bolt-in compatible with all Hooker Blackheart headers, exhaust manifolds and exhaust systems available for this vehicle application
  • Designed for use with 71223029HKR (black) or 71223030HKR (red) transmission mount
  • Revised Design for easier installation with removable feet

Specs:

Application 1970-1981 GM F-Body
Brand Hooker BlackHeart
Color Black
Emission Code 6
Engine GM Gen III/IV (LS)
Exhaust Series Hooker BlackHeart
Finish Black Powdercoated
Material Steel
Motor Type GM LS
Product Type Transmission Crossmember
Subframe Stock
Transmission 200R4
Transmission 4L80E
Transmission 4L85E
Transmission T56 GM
Transmission T56 Magnum GM
Transmission TH400
Transmission Type T56 (GM F-Body/GTO LS versions only) or T56 Magnum
Type of Component Crossmember

Applications:

  • Fits:
    • 1970-1971 Chevrolet Camaro
    • 1970-1974 Pontiac Firebird
  • Engine: LS Swap


Fitment Notes: 

  • This crossmember is designed as an Integral component of the complete Hooker Blackheart LS swap system for this vehicle application. Its unique design geometry is designed for compatibility with Hooker Blackheart 12512HKR and 12613HKR engine mounting brackets only.
  • Due to design variances in the crossmember mounting hole locations on GM 2nd-gen F-body subframes, the mounting holes in this crossmember may not line-up directly with the mounting holes in your subframe. In such cases, the crossmember will need to be mounted using angle brackets included with this crossmember (requires drilling new holes in the subframe).
  • Direct installation of a T56 (GM F-Body/GTO LS versions only) or T56 Magnum transmission.
  • 4L80E or 4L85E Transmissions REQUIRE Part Number 71223013HKR
  • TH400 or 2004R Transmissions REQUIRE Part Number 12650HKR
  • Note: this crossmember is not compatible with Tremec TR6060 transmissions
  • Designed for use with 71223029HKR (black) or 71223030HKR (red) transmission mount
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25010415048

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Verified Purchase
Jason Lefebvre
Louisville, US
★★★★★ 5
Top notch mount with high build quality
I love it when I take a chance and spend some extra money hoping for a quality product - and it actually pans out. I bought this for my 2nd gen Toyota Tacoma (2014). The install was fast. Instructions were clear. The mount is ROCK solid and has two points of articulation so I can position my phone well. I couldn't ask for a better product. The price I paid was a little steep for a mount, but if you demand quality then look no further.
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Reviewed in the United States on October 21, 2025
M
Verified Purchase
Michael
Cuba, US
★★★★★ 5
Must buy.
use this thing every day I combined it with a quad lock MagSafe compatible charger and I could not imagine my life without it makes charging and using Google maps so much easier. really easy install extremely sturdy and it fit perfectly.
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Reviewed in the United States on January 6, 2026
A
Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 1
Not compatible for Kia K5
Unfortunately, I had to return due to not being capatible with my K5.
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Reviewed in the United States on September 10, 2025
A
Verified Purchase
Amazon Customer
Natrona Heights, US
★★★★★ 5
Great product
Great love it
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Reviewed in the United States on August 3, 2025
M
Verified Purchase
matthew r kovanda
Draper, US
★★★★★ 4
works as it shoud
works as it should
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 24, 2025

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