Holley EFI 558-121 Electronic Throttle Harness
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US$212.78
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Product details
| Management number | 254716873 | Release Date | 2026/11/07 | List Price | US$212.78 | Model Number | 254716873 | ||
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| Category | |||||||||
2x4 Main Harness;<br><br>Introducing 2x4 Terminator Stealth EFI upgrade components. The wait is over. These upgrade components allow you to use your current Terminator Stealth EFI throttle body, install a new main harness, and slave throttle body, and you are finished. This upgrade is also perfect for anyone wanting to convert their 2x4 supercharged combo over to Electronic Fuel Injection!;
- 2x4 Side Mount Stealth Throttle Bodies â€" Provide the great looks of a classic Holley 4150 Carburetor, without any of the hassles
- Multiple Color options allows for any Terminator Stealth EFI system to be upgraded to a 2x4
- Plug and Play Main Harness provides a clean finished appearance and allows for a quick install!
- Laptop Tuning is Required with this upgrade, we recommend taking your vehicle to a certified Holley EFI Tuner/Installer
| Manufacturer part number | 558-121 |
|---|---|
| Automotive specialty part type | Electronic Throttle Harness |
| Vehicle fitment type | Specific |
| Vehicle model | 558-121 |
| Brand | Holley EFI |
| Weight | 2.85 lb |
| Finish | Machined |
| Items included | 2x4 Main Harness |
| Vehicle type | Car |
| Automotive parts division | Performance |
| Model | 558-121 |
| Count per pack | 1 |
| Has written warranty | No |
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