


Holley EFI Lightweight Dominator ECU
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Holley EFI Lightweight Dominator ECUPN 554 114LW is a Holley EFI Dominator ECU which utilizes a lighter potting material than the standard Dominator unit (reduces total weight by 1. 8 lbs). This lightweight version is specifically intended for drag racing. It is not recommended for use in high heat conditions (under hood mounting installations), and applications with high continuous current draw. Features Designed for GM LS Gen III and IV engines equipped with GM LS3 L92 cylinder heads
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Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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★★★★★ 1
Not fit
I was overseas. They said it will fit this car 2024 RX350h, not at all, completely difference style. Tried to return it, no luck.
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Reviewed in the United States on May 8, 2025
★★★★★ 5
Works
Works as it should.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Good and easy filter replacement
Filter was great and easy replacement
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Reviewed in the United States on October 27, 2025
★★★★★ 5
Engine abd
Good quality, sturdy, and easy to install.
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Reviewed in the United States on September 7, 2025
★★★★★ 4
Working great
Both filters fit just right and are doing a great job.
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Reviewed in the United States on October 9, 2025