SKU: 36503589685

Holley 550-872 Sniper Stealth 4150 Self-Tuning Fuel Injection System 4150 Flange

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Description

Holley 550-872 Sniper Stealth 4150 Self-Tuning Fuel Injection System 4150 FlangeOverview: The Sniper Stealth 4150 EFI system from Holley features 4, 100LB HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Super Sniper Stealth 4150 EFI system from Holley features 4, 100LB HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The 8 injector variation is capable of supporting up to 1250 HP on forced

Overview:

The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Super Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The 8 injector variation is capable of supporting up to 1250 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of complete ignition timing control, fuel self-learning, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications? Master Kits include complete fuel system with an external fuel pressure regulator preset to 58.5psi, 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!

Features:

  • Bolt on 4150 flange carburetor replacement fit's a wide range of factory intake manifolds
  • Throttle body mounted ECU - no extra boxes to mount
  • Supports up to 650HP with four 100lb/hr injectors or 1250HP with eight 100lb/hr injectors
  • All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
  • Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
  • Air entry is machined to fit most stock style air cleaners with air cleaner locator provisions
  • Only 4 wiring connections required! (Battery +, battery - , switched ignition & RPM)
  • Requires use of external fuel pressure regulator, Holley PN# 12-886 or equivalent, set to a base pressure of 58.5 PSI
  • Integrated ignition timing control improves idle stability, drive-ability, and wide open throttle response
  • 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!
  • The included Genuine Bosch LSU 4.9 wideband oxygen sensor provides realtime fuel map learn!
  • OEM style TPS/IAC and fuel pressure regulator, for years of dependable service
  • Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with stainless steel T-bolt clamps and a stainless steel (weldable) oxygen sensor flange
  • Also available in Black, PN# 550-871 and Shiny, PN# 550-870 finishes

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley Sniper EFI
CFM 870
Emission Code 3
Finish Classic Gold
Flange Style 4150
Fuel Pressure 58.5 PSI
Height 3.28"
Injector Size 100 lb/hr @ 58.5 PSI
Inlet / Outlet Size 3/4-16 Female O-Ring (AN 8)
MAP Sensor 2Bar
Max Horsepower Rating 650 Naturally Aspirated
Model 4150 EFI Conversion Throttle Body
Product Type Sniper Stealth EFI
Transmission 700R4/200R4
Transmission Ford C4/C6
Transmission TH350
Warning California Proposition 65
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • 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]
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SKU: 36503589685

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Dandy
Birmingham, US
★★★★★ 3
Bottom screw will rust and permanently stain counter
Color: Black, Material Type: Stainless Steel, Color: Black, Material Type: Stainless Steel
Besides the ungalvanized or stainless steel bottom screw that rusts at the first sign of moisture this product has held up incredibly well. I've used the product for 3 years and that is the only problem. I'm probably going to get a deduction in my security deposit for the rust stains that have permeated the countertop. The rest of the product is really well made and holds up well
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Reviewed in the United States on March 22, 2026
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Deborah V.
Alexandria, US
★★★★★ 5
Crafting Convenience: Sturdy and Stylish One-Handed Towel Holder for Creative Spaces
Color: Black, Material Type: Stainless Steel
Thisit has become a great addition to my craft area. The struggle to find a convenient place for paper towels is real, especially when crafting can get a bit messy. Prior attempts with a magnetic holder fell short, as it couldn't support the weight of a full paper towel roll. The promise of a one-handed dispensing solution was intriguing and seemed like the perfect fit for my needs. While I can't unequivocally say this holder allows for flawless one-handed dispensing – it seems the success of that feature might depend on the angle at which the towel is torn – it's still a significant upgrade from my previous setup. The sturdy stand ensures the towels are always within reach, without the risk of the holder tipping over or the roll coming loose. Apart from its functionality, the aesthetic aspect of this towel holder is a notable advantage. Its minimalist design doesn't just save space; it also contributes to the overall look and feel of my crafting space. The wrought iron style is a perfect match with my other accessories, creating a cohesive and stylish environment. In conclusion, this towel holder is more than just a functional tool; it's a stylish addition that enhances the convenience and appearance of my crafting area. Its sturdy build, practical design, and complementary style make it a winner in my book.
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Reviewed in the United States on January 25, 2024
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DSaT
Omaha, US
★★★★★ 5
Nice quality and sleek paper towel holder!
Color: White, Material Type: Stainless Steel
Live the sleekness and quality of this paper towel holder. Blends in great with my white backsplash!
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Reviewed in the United States on June 1, 2026
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V. h
Natrona Heights, US
★★★★★ 5
Matching well
Color: White
Cute and practical
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Reviewed in the United States on April 8, 2026
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Doris Rodriguez
Dallas, US
★★★★★ 5
I love it
Color: White
I love! Good quality, good size
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Reviewed in the United States on March 10, 2026

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