2015–2023 Hemi Standalone Wiring Harness | 8HP Transmission Swap Harness
2015–2023 Car Hemi Standalone Wiring Harness for 8HP Transmission Swaps
Finish your Hemi swap with a cleaner, easier-to-install wiring solution built for 2015–2023 car-based Hemi 5.7L and 6.4L applications. This standalone harness is designed for builders using an 8HP transmission and factory Hemi engine harness while simplifying the wiring needed to power the engine in custom builds, older vehicles, and hot rods.
Quick Answers
This 2015–2023 Car Hemi standalone wiring harness is built for 5.7L and 6.4L USA Hemi engines from Charger, Challenger, and 300C models. It supports 8HP transmission swaps, includes a Sound German Automotive 8HP transmission harness and computer kit, features premium braided wire cover, labeled wire ends, and plug-and-play connection into your existing factory Hemi engine harness and ECM.
Why This Harness Makes Sense
Built for 8HP Hemi Swaps
Designed for builders swapping a 2015–2023 car-based Hemi engine with an 8HP transmission into older vehicles, hot rods, and custom projects.
Includes 8HP Control Support
This harness comes with the Sound German Automotive 8HP transmission harness and computer kit needed for 8HP transmission integration.
Cleaner Install
Premium braided wire covering and labeled wire ends help reduce wiring confusion and create a cleaner, more professional engine bay layout.
Swap-Focused Tech Support
Phone tech support is included, giving Hemi swap builders extra help when wiring, tuning, and finishing their project.
Fitment and Compatibility
- 2015–2023 car-based Hemi applications
- 5.7L Hemi engines
- 6.4L Hemi engines
- 2015–2023 Dodge Charger
- 2015–2023 Dodge Challenger
- 2015–2023 Chrysler 300C-style Hemi applications
- All 8HP transmissions
- Designed to plug into your existing factory Hemi engine harness
- Designed to work with your existing factory ECM
What’s Included
- Premium braided wire cover at no extra cost
- Sound German Automotive 8HP transmission harness
- Sound German Automotive 8HP computer kit
- Plug and play connection into your existing Hemi engine harness
- Labeled wire ends for 12V power, ground, fuel pump, starter, and more
- Support for all 8HP transmissions
- Phone tech support included
- Built for standalone Hemi engine swap projects
- Plug-and-play full harness connectivity for 2005–2022 Charger/Challenger dual electric fans — non-PWM
8HP Transmission Notes
This harness supports 8HP swaps with the majority of FCA calibrations only. Some TCMs may require reprogramming, and support is being expanded as issues arise.
Builder Notes
This harness is designed as a basic Hemi engine swap harness for most older vehicles and hot rods with fewer electronics. It is made to help power the engine in a standalone swap setup while keeping the installation cleaner and easier to manage.
This harness comes standard with AC command control for your factory Hemi AC compressor. It does not include provisions for factory gauges or other accessories such as heat, cruise control, ABS, and similar factory vehicle systems. Those items will need to be added by the end user as desired.
Available Support Services
- Phone tech support is included
- Mail order tuning starting at $100.00
- Base tunes starting at $100.00
- Remote tuning starting at $200.00
- Basic tuning training starting at $350.00
- Advanced tuning starting at $600.00
Frequently Asked Questions
What engines does this harness work with?
This harness is designed for 2015–2023 car-based Hemi 5.7L and 6.4L USA engines, including Charger, Challenger, and 300C applications.
Does this harness support the 8HP transmission?
Yes. This harness supports all 8HP transmissions and includes the Sound German Automotive 8HP transmission harness and computer kit needed.
Does this replace the factory engine harness?
No. You still need the factory engine harness on the engine. This HPI harness is designed to plug into your existing factory engine harness and ECM.
Is this harness plug and play?
It is designed to plug into your existing Hemi engine harness and ECM, with labeled wire ends for key connections such as power, ground, fuel pump, and starter.
Is tech support included?
Yes. Phone tech support is included, and HPI also offers mail order tuning, base tunes, remote tuning, and tuning training services.
Ready to Simplify Your 8HP Hemi Swap?
Get a 2015–2023 Hemi standalone wiring harness built for cleaner installation, easier hookup, 8HP transmission support, and real swap-focused tech support.
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