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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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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 1369 reviews
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Product Reviews
★★★★★ 5
Good Plug if you need this model
These are the OEM for Kohler 7000 series I did service on. They needed to be gapped but that’s every spark plug.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 4
Plugs
They are sparkling plugs. They spark.
Very slow on delivery.
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Champion is my favorite
They fit my cub cadet
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Reviewed in the United States on March 18, 2026
★★★★★ 5
Flat tire… try this.
Size: 1 Gallon + Tool, Set name: Small Tire/Bicycle Formula
For husband, that’s what he puts in our tires great price and works well
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Go Ridding and Go Flatless with QuickStrike tire sealent
Size: 1 Gallon + Tool, Set name: Off-Road Formula
I’ve tried several tire sealants over the years on my ebikes and scooters, but FlatOut QuickStrike is by far the best I’ve used. From the moment I added it to my bike tires, I noticed a difference—it’s incredibly easy to install, and you don’t have to convert to tubeless to benefit from its protection. The formula is thin and spreads quickly, sealing punctures almost instantly so you don’t lose much air.
What I feel that really stands out is how effective it is. I ride my ebikes through rough terrain with lots of thorns and debris, and since using FlatOut QuickStrike, I haven’t had a single flat ( unlike before ). Even when I’ve picked up multiple punctures, the sealant has handled them all without a problem. I feel that the peace of mind it gives me is priceless, especially on long rides or commutes where a flat could ruin your day ( and It has in the past ).
Another big plus is that it’s a one-time application—it won’t dry out or turn into a mess inside your tire ( like that Green Stuff ). It’s also safe for both tubes and tubeless setups, and works well in my 20 inch and 14 inch tires. I’ve used it on my ebikes and scooters and the results have been consistently impressive.
Make me feel confident of the durability of my tires on my ride. I bought the gallon bottle because I have a few ebikes and scooters. this stuff works great!
If you want to spend less time fixing flats and more time enjoying your ride, this is the sealant to get. Highly recommend!
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Reviewed in the United States on June 14, 2025