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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
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Description
Holley EFI Terminator X Stealth GM LS 4150 - Gold 550-106258X Crank 4 Injectors 650 HP Features: All of the wiring exits below the fuel injector bowls, for a completely stealth installation Air entry machined to fit most stock style air cleaners with air cleaner locator provisions External fuel pressure regulator required, set to a base pressure of 58. 5 PSI, such as 12 886 Integrated ignition timing control ?"Plug and play with factory LS coil sub harness and OEM LS coils ?" no external boxes modules needed
58X Crank - 4 Injectors - 650 HP
Features:
- All of the wiring exits below the fuel injector bowls, for a completely stealth installation
- Air entry machined to fit most stock style air cleaners with air cleaner locator provisions
- External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886
- Integrated ignition timing control ?"Plug and play with factory LS coil sub harness and OEM LS coils ?" no external boxes/modules needed to run Coil Near Plug
- High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
- Simple Calibration Wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
- Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
- Self-tuning ECU means you don?™t have to be a computer/tuning wiz to have EFI!
- 4 Inputs ?" 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure Inputs are pre-terminated)
- 4 Outputs ?" Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
- OEM Style TPS/IAC, for years of dependable service
- Available in 3 finishes: Shiny, Black and Gold
- Compatible with Holley EFI digital dashes, gauges and fuel system accessories
Specs:
| Accelerometer Support | Yes |
|---|---|
| Boost Control | Yes |
| Brand | Holley EFI |
| CAN-BUS Support | Yes |
| CFM | 950 |
| Coil Per Cylinder Ignition Support | Yes |
| Color | Gold |
| Crank Reluctor | 58x |
| Datalogging Support | Yes |
| Distributor Included | No |
| Dry Nitrous Control | Yes |
| e85 Support | No |
| EGT Support | Yes |
| Emission Code | 3 |
| Finish | Gold |
| Flange Size | 4150 |
| Flange Style | Squarebore |
| Forced Induction Support | Yes |
| Fuel Filter Included | No |
| Fuel Hose Included | No |
| Fuel Injectors Included | Yes |
| Fuel Pressure | 58.5 PSI |
| Fuel Pressure Regulator Included | No |
| Grade Type | Performance |
| Handheld Included | Yes |
| Ignition Timing Control | Yes |
| Ignition Type | GM LS 58x |
| Individual Cylinder Fuel Corrections | No |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet / Outlet Size | 6AN |
| Intake Manifold Included | No |
| Knock Retard Support | Yes |
| MAP Sensor | 1bar |
| Max Horsepower Rating | 650 |
| Multi-Stage Nitrous Control | Yes |
| Product Type | EFI System |
| Progressive Nitrous Control | Yes |
| Sale Category | Air and Fuel Delivery |
| Self-Tuning | Yes |
| Terminator LS Options | Fuel, Spark |
| Throttle Bore | 1.75 in. |
| Throttle Position Sensor Included | Yes |
| Transmission | N/A |
| User-Tuneable | Yes |
| Warning | California Proposition 65 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
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
4.2 ★★★★★
Based on 2265 reviews
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Product Reviews
★★★★★ 4
A good shoe from a trusted brand
Size: 13 Wide, Color: Medium Natural Nubuck, Size: 13 Wide, Color: Medium Natural Nubuck
I'm mostly happy with these so far. They're generally well made, they look great, and I know they'll last a long time. They're real leather, which is always greatly appreciated in this synthetic era. They are pretty dang supportive and comfortable overall. They're lightweight and the price is right.
But there are a few negatives, mainly on the comfort front. The right shoe fits perfectly, but the left one isn't quite right. It feels like the top of the heel is stitched a little too tight, such that it digs into the back of my heel when I walk. Now, this isn't uncommon for me with new shoes, but I do kind of expect better from Rockport. The other issue is that the shoes feel a little bit slippery on low pile carpets and tile. Now I'm sure both of those issues are temporary, and will resolve as the shoes break in. Still, they're noticeable.
What can I say? They're Rockports. You know they're going to be solid shoes. I almost love these shoes, and really, I'm sure in a few months, when they're fully broken in, I will love them unreservedly. But not quite yet.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Sharp looking dress shoes
Size: 14 Wide, Color: Medium Natural Nubuck
These shoes look great in person and have a clean, classic style that works well for the office, church, or more formal occasions. The natural nubuck gives them a nice appearance without being overly flashy, and they look more expensive than they actually are.
The fit was good in the wide size, and they were comfortable right out of the box. The overall quality seems very good, with solid construction and materials that feel like they should hold up well over time. For the price, they're a good value and a nice option if you're looking for a sharp looking pair of dress shoes.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
All day comfort!
Size: 12, Color: Grey Nubuck
I was looking for a pair of dress shoes that I could spend a lot of time in and be comfortable. I am happy to report that I’ve found them! I’ve always heard a lot about the Rockport brand, but never wanted to cough up the money that I do for say, Hoka athletic shoes. I can now see what folks do. Very comfortable right from the unboxing. My feet are so happy. The shoes themselves look great, and feature a really strong build quality. The price is a little on the steep side, but I’m learning you get what you pay for in most cases. Definitely a great product that I won’t hesitate to purchase again when needed.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Classic, Comfortable Suede Shoes with Everyday Versatility! Love the Product
Size: 9.5, Color: Dark Taupe Suede
These Rockport Men’s Foley suede shoes offer a clean, classic look that works well for both casual and smart-casual outfits. The dark taupe suede finish gives them a refined yet relaxed style that pairs easily with jeans, chinos, or dress pants. They’re versatile enough for office wear, dinners, or everyday outings.
Comfort is a strong point, with a cushioned insole and lightweight construction that makes them easy to wear for extended periods. The fit feels supportive without being stiff, and the overall build quality feels durable. Overall, these are stylish and comfortable suede shoes that balance professionalism with everyday wearability.
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Reviewed in the United States on June 6, 2026
★★★★★ 5
La calidad
Color: White, Size: Medium, Color: White, Size: Medium
Súper excelente 10 de 10 le doy a este producto
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Reviewed in the United States on May 13, 2026