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Holley EFI 550-858

Name: Holley EFI 550-858
Brand: Holley Sniper EFI
SKU: 939912712
Price: 1258.95 USD
Availability: InStock

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Key item features

Jeep Specific: Engineered as a direct bolt-on BBD carburetor replacement for 1971-1986 Jeep CJs equipped with 258ci 6-cylinder engines.
Integrated ECU: Features a throttle body mounted ECU, eliminating the need for additional external control boxes, simplifying installation.
Powerful Fueling: Supports up to 350 horsepower with two 100lb/hr injectors and includes an internal fuel pressure regulator preset to 58.5 PSI.
Simplified Wiring: Requires only four wiring connections: Battery +, Battery -, Switched Ignition, and RPM, for straightforward setup.
Intuitive Tuning: Utilizes a high-resolution full-color touchscreen for initial setup, tuning, and gauge displays, with a simple calibration wizard that creates base maps automatically.
Self-Learning System: Incorporates a self-tuning ECU and a Genuine Bosch LSU 4.9 Wideband Oxygen Sensor for real-time fuel map learning without requiring a laptop.
Complete Installation: Includes an OEM style TPS/IAC and fuel pressure regulator, along with a clamp-on oxygen sensor kit for 2.25" exhaust, featuring stainless steel T-bolt clamps and a weldable flange.

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Specs

Vehicle model
550858
Vehicle year
1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986
Vehicle make
Jeep(R)?
Vehicle fitment type
Specific
Automotive parts division
Performance
Brand
Holley Sniper EFI

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Comparison Overview:
Product	Viewing this item Holley EFI 550-858 current price Now $1,258.95, Was $1,349.95 Holley EFI 550-858	Holley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDM current price Now $1,168.95, Was $1,299.95 Holley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDM	EFI4 BLK KT W/ INLINE FP current price $1,272.99 EFI4 BLK KT W/ INLINE FP 2 out of 5 Stars. 4 reviews	Holley EFI 558-513 EFI MPFI Harness Kits current price $972.95 Holley EFI 558-513 EFI MPFI Harness Kits	Holley EFI 550-866 Sniper EFI Self-Tuning Kit current price Now $1,303.95, Was $1,399.95 Holley EFI 550-866 Sniper EFI Self-Tuning Kit	Holley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish current price $98.95 Holley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	Holley EFI 550-871 4150 Sniper Stealth current price Now $1,393.95, Was $1,499.95 Holley EFI 550-871 4150 Sniper Stealth	Holley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top current price $1,168.95 Holley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top

Comparison Chart:
Vehicle model	550858Holley EFI 550-858	550-511-BXXHolley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDM	Go EFI 4 600 HPEFI4 BLK KT W/ INLINE FP	FoxbodyHolley EFI 558-513 EFI MPFI Harness Kits	CamaroHolley EFI 550-866 Sniper EFI Self-Tuning Kit	CoyoteHolley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	-Holley EFI 550-871 4150 Sniper Stealth	351WHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top
Vehicle make	Jeep(R)?Holley EFI 550-858	-Holley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDM	-EFI4 BLK KT W/ INLINE FP	FordHolley EFI 558-513 EFI MPFI Harness Kits	-Holley EFI 550-866 Sniper EFI Self-Tuning Kit	FordHolley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	FordHolley EFI 550-871 4150 Sniper Stealth	FordHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top
Vehicle fitment type	SpecificHolley EFI 550-858	SpecificHolley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDM	UniversalEFI4 BLK KT W/ INLINE FP	SpecificHolley EFI 558-513 EFI MPFI Harness Kits	SpecificHolley EFI 550-866 Sniper EFI Self-Tuning Kit	SpecificHolley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	UniversalHolley EFI 550-871 4150 Sniper Stealth	SpecificHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top
Automotive parts division	PerformanceHolley EFI 550-858	PerformanceHolley 550-511-BXX Sniper 2 EFI - Black, Base Kit Without PDM	-EFI4 BLK KT W/ INLINE FP	-Holley EFI 558-513 EFI MPFI Harness Kits	PerformanceHolley EFI 550-866 Sniper EFI Self-Tuning Kit	-Holley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	PerformanceHolley EFI 550-871 4150 Sniper Stealth	PerformanceHolley EFI 300-310 351W Ford Hi-Ram EFI Manifold with Side Mount Top

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About this item

Product details

for 1971-1986 Jeep CJ's with 258ci 6 Cylinder Engines;

Are you tired of struggling with the old BBD carburetor on your Jeep®? Does your off road rig leave you hanging at extreme angles while on the trail? The EFI team at Holley® has designed the perfect solution for your problems. Introducing the Sniper EFI BBD, for Jeep CJ's! The Sniper EFI BBD will be right at home on any 258ci powered trail rig, or weekend cruiser. Not only does the Sniper EFI BBD offer superior throttle response and WOT power over the carburetor, but you can also gain timing control! Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today!;

Bolt on BBD Carburetor Replacement
Engineered specifically for 1971-1986 Jeep CJâ€™s with 258ci 6 Cylinder Engines
Throttle body mounted ECU â€" no extra boxes to mount
Supports up to 350HP with Two 100lb/hr Injectors
Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
Integrated ignition timing control
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 donâ€™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

info:

We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.

Specifications

Vehicle model

550858

Vehicle year

1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986

Vehicle make

Jeep(R)?

Vehicle fitment type

Specific

Warranty

Warranty information

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warnings

Warning Text

California Proposition 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.com

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