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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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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:
- 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
4.7 ★★★★★
Based on 420 reviews
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Product Reviews
★★★★★ 5
Like the style
Color: Black-satin, Size: XX-Large
Fits good
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Reviewed in the United States on April 4, 2026
★★★★★ 5
Buena compra !!
Color: Black-satin, Size: Medium
Me gustó el detalle y la caída del pantalón, lo compraré otra vez en el futuro.
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Reviewed in the United States on September 3, 2025
★★★★★ 1
Runs EXTREMELY small
Color: Black-satin, Size: 3X-Large
Ordered a 3X but got a XS…i am a 42-44, got the 3X to have tapered to my fit, but upon opening the pants, it seemed they may be more of a 32-34 and the adjustable straps aren’t really adjustable, they are just buckles sewed in place for design. The 3X tag sewn in is a complete lie! Only giving 1 star because they did have the satin tuxedo stripe on the side!
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Reviewed in the United States on November 26, 2025
★★★★★ 1
too long for them to come in it's not worth the headache not true
Color: Black-satin, Size: X-Large
I waited forever and when it finally came it was too small, they run small not true size
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Reviewed in the United States on March 16, 2026
★★★★★ 2
Too small
Color: Black-satin, Size: X-Large
Nice material but far too small compared to the size that it says.
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Reviewed in the United States on May 11, 2026