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Description
HP EFI ECU & Harness Kits - 550-603NOverview: Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more. Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous fed LS engine on water meth? This HP EFI kit can control that too! Features: Simple Installation Plug and Play control of GM LS2 LS3 LS7 engines. Just plug the harness into your factory
Overview:
Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more. Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous fed LS engine on water/meth? This HP EFI kit can control that too!
Features:
- Simple Installation - Plug and Play control of GM LS2/LS3/LS7 engines. Just plug the harness into your factory sensors, wire the power and grounds and you are ready to take complete control of your LS engine
- More Functionality - Provides significantly more functionality than OEM or other competitive ECUs (boost control, nitrous control, water/meth injection, plus a host of additional inputs and outputs to control fans, pumps, relays etc.)
- Easy To Use - Laptop programmable ECU includes a variety of base maps that will have you hitting the cruise or track in no time
- Ideal For Everything - including stock 5.3L engine swaps or all out, 3,000+ horsepower race cars that need a simple and powerful ECU and harness solution
- Industry Leading Self Tuning Fuel Strategy - means less time tuning and more time enjoying the power of your LS vehicle
- Kit includes ECU, harness, communication cable, software, USCAR (EV6 Style) injector connectors, and NTK wideband O2 sensor, designed to be used with GM LS2/LS3/LS7 engines with factory GM coils and a 58 tooth crank sensor
- The NTK Oxygen Sensor is recommended when using leaded or methanol fuels, high exhaust and forced induction applications or for highest precision feedback
- ECU is fully potted and can be mounted in the engine compartment or interior
- Sealed automotive and marine grade connectors
- 1-5 Bar MAP sensor capability
- Optional plug and play hand-held programmer, 5.7" touch screen and digital gauges are available for ultimate control and vehicle monitoring
- ECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance
- For a full list of advanced features such as boost, nitrous, water/meth, individual cylinder control and more click the document icon under the product image!
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Crank Reluctor | 58x |
| Emission Code | 4 |
| Ignition Type | GM LS 58x |
| Injector Connector | USCAR (EV6) |
| Product Type | HP EFI Kit |
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
4.3 ★★★★★
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Product Reviews
★★★★★ 5
Finally!
Size: 2.5 Fl Oz (Pack of 1)
I have been looking for a sunscreen that does not breaks me out or irritate my eyes and this was perfect. I wash my face in the morning and I put this sunscreen on. I don't need to use moisturizer since this is enough. It does leave my skin glowy which I like but not greasy. I notice even my dark spots are fading but because I do use this everyday. My skin is tan and it does not leave a white cast. I love it. If you have acne prone skin, oily and sensitive give this a try.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Finally! An SPF Hubby will wear!
Size: 2.5 Fl Oz (Pack of 1)
I've bought my husband at least a dozen SPFs--everything from drugstore to premium brands--and he won't wear any of them. He's 64 years old with oily, extremely sensitive skin (rosacea and dermatitis), and a tendency to sweat a lot in the summer heat, as he's very active. As for SPF, he hates the white cast, how heavy it feels on his skin, and how his eyes burn when he sweats and the SPF gets in them. But I keep trying. Since Eucerin was the only SPF I was able to tolerate after radiation, I tried this one for him. It's the only one he's liked. There's some white cast initially but it settles quickly. He says the lotion doesn't feel heavy, hasn't caused any irritation or breakouts, and doesn't bother his eyes either. He actually wears this one!!! I'm thrilled! Thank you, Eucerin!
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Oily skin
Size: 2.5 Fl Oz (Pack of 1)
My skin is oily so sometimes I try different sunscreen and my skin doesn’t approve . This one is my favorite ever
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Highly recommended!
I ’ve been using the Age Defense Face Sunscreen Lotion for a while now, and it has quickly become a staple in my skincare routine. The formula is lightweight, non-greasy, and absorbs quickly without leaving a white cast, making it perfect for everyday use. It provides broad-spectrum protection, shielding my skin from both UVA and UVB rays while also containing anti-aging ingredients that help keep my skin looking youthful and hydrated.
One of the standout features is its moisturizing effect—it doesn’t dry out my skin or clog pores, making it suitable even for sensitive skin. I also appreciate that it layers well under makeup without pilling. The added antioxidants are a bonus, offering extra protection against environmental stressors.
The only minor downside is that it has a slight scent, which might not be ideal for those who prefer fragrance-free products. However, the scent fades quickly and isn’t overpowering.
Overall, this sunscreen is a great choice for anyone looking for reliable sun protection with added skincare benefits. It’s effective, comfortable to wear, and leaves the skin feeling soft and smooth.
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Reviewed in the United States on March 1, 2025
★★★★★ 5
Protective
I love the protection and hydration is gives to my skin. Perfect for skin of color.
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Reviewed in the United States on February 16, 2026