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Holley Sniper EFI has arrived and it's here to change the traditional ways of thinking about electronic fuel injection. No more long hours of scrapping together OEM parts, learning how to tune on a laptop, or working through hundreds of hours of wiring diagrams just to hear your engine spit and sputter in the garage. Holley has stepped up to the plate and knocked it out the park with their affordable Sniper EFI fuel injection systems and engine components. With over 100 years of building quality fuel systems, you can trust Holley Sniper with all your electronic fuel injection needs!
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Holley Sniper 550-511K EFI 4150 4-Barrel Self-Tuning Master Kit
$1,304.99 (5)
Universal Fit, 800 CFM CFM, 3 Emission Code, Black
Video Available
CFM: 800 CFMEmission Code: 3Throttle Bore: 1.6875 (1 11/16ths)Color: Black
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Holley Sniper 550-865K EFI 2GC Master Kit, Black Ceramic Finish
$1,249.99
Throttle Body Injection Style, User Tunable, Black
On Sale
Video Available
Injection Style: Throttle BodyUser Tunable : YesSelf Tuning: YesEGR: No
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Holley Sniper 550-510K EFI 4150 4-Barrel Self-Tuning Master Kit
$1,304.99 (8)
Universal Fit, 800 CFM CFM, 3 Emission Code, Polished
Video Available
CFM: 800 CFMEmission Code: 3Finish: PolishedThrottle Bore: 1.6875 (1 11/16ths)
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Holley Sniper 550-510 EFI 4150 4-Barrel Self-Tuning Base Kit
$1,034.99
Universal Fit, Polished
Video Available
Finish: PolishedThrottle Body Barrels: 4-Barrel
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Holley Sniper 550-865 EFI 2GC Base Kit, Black Ceramic Finish
$999.99
Throttle Body Injection Style, User Tunable, Black
On Sale
Video Available
Injection Style: Throttle BodyUser Tunable : YesSelf Tuning: YesEGR: No
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Holley Sniper 550-511 EFI 4150 4-Barrel Self-Tuning Base Kit
$1,034.99 (2)
Universal Fit, Black, Black
Video Available
Finish: BlackColor: BlackThrottle Body Barrels: 4-Barrel
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Holley Sniper 550-516K EFI 4150 4-Barrel Self-Tuning Master Kit
$1,304.99 (2)
Universal Fit, 800 CFM CFM
On Sale
CFM: 800 CFMMAP Sensor Included: NoThrottle Body Barrels: 4-Barrel
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Holley Sniper 550-849K EFI 2300 2-Barrel Self-Tuning Master Kit
$1,148.99
Throttle Body Injection Style, User Tunable, Shiny
Video Available
Injection Style: Throttle BodyUser Tunable : YesSelf Tuning: YesEGR: No
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Holley Sniper 550-516 EFI 4150 4-Barrel Self-Tuning Base Kit
$1,034.99
Universal Fit, 800 CFM CFM
On Sale
CFM: 800 CFMThrottle Body Barrels: 4-Barrel
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Holley Sniper 550-851K EFI 2300 2-Barrel Self-Tuning Master Kit
$1,200.99
Universal Fit, Throttle Body Injection Style, Anodized
Video Available
Injection Style: Throttle BodySelf Tuning: YesInjectors Included: YesInjector Size: 100 lb/hr at 58.5 PSI
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Holley Sniper 890010B Fabricated Valve Covers, 1958-86 SBC, Black
$131.99
283, 302, 305, 307, 327, 350, 400, Baffled
On Sale
Valve Cover Height: StockValve Cover Mounting Style: Perimeter BoltValve Cover Top Style: Sniper logoBaffled: Yes
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Holley Sniper 550-850K EFI 2300 2-Barrel Self-Tuning Master Kit
$1,200.99
Universal Fit, Throttle Body Injection Style, Ceramic
Video Available
Injection Style: Throttle BodySelf Tuning: YesInjectors Included: YesInjector Size: 100 lb/hr at 58.5 PSI
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Holley Sniper 565-300 EFI Hyperspark Distributor, SBC/BBC
$249.99
Chevy Small Block V8, Chevy Big Block V8, PolishedHolley Efi Software Download
On Sale
External Ignition Box Required: NoCap Type: HEI / MaleAdvance Type: ElectronicTrigger Style: Magnetic
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Holley Sniper 829081 EFI Sheet Metal Intake Manifold, 05-09 Ford
$579.99
4.6, EFI Fuel System Type, Multi-port Injection Style
On Sale
Fuel System Type: EFIInjection Style: Multi-portIntake Manifold Type: Hi-RamRPM Range: 2,200-6,800
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Sniper 550-518 4150 Super Sniper, 650 HP, Polished
$1,241.99
Universal Fit, Throttle Body Injection StyleInjection Style: Throttle BodyUser Tunable : YesSelf Tuning: YesEGR: No
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Holley Sniper 556-151 EFI Hyperspark Ignition Box
$199.99
Universal Fit, Capacitive Discharge Ignition Box Output
On Sale
Ignition Box Output: Capacitive DischargeCircuitry: DigitalData Acquisition: NoCoil Included : No
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Holley Sniper 825071 Sheet Metal Intake Manifold, SBC, Silver
$492.99
262, 265, 283, 302, 305, 307, 327, 350, 400, Anodized
On Sale
Fuel System Type: CarburetedIntake Manifold Type: Tunnel RamCarburetor Quantity: TwoCarburetor Flange Type: 4-Barrel Square Bore
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Holley Sniper 870001 Throttle Position Sensor, 92/102mm
$31.99
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Holley Sniper 19-411 EFI Fuel Tank, 1965-67 GM A-Body
$599.99
Buick, Chevy, Oldsmobile, Pontiac, EFI Fuel System Type
On Sale
Fuel Tank Style: EFI ConversionFuel System Type: EFICapacity: 24 gallonsMaterial Type: Steel
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Holley Sniper 820112 EFI Short Sheet Metal Intake Manifold, 102mm
$612.99
LQ4, LQ9, LS1, LS2, LS6, LY6, EFI Fuel System Type
On Sale
Fuel System Type: EFIInjection Style: Multi-portIntake Manifold Type: Hi-RamRPM Range: 1,800-6,400
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Holley Sniper 890002B Fabricated Valve Covers, 1965-00 BBC, Black
$142.99
396, 402, 427, 454, Stock Valve Cover Height, Baffled
On Sale
Valve Cover Height: StockValve Cover Mounting Style: Perimeter BoltValve Cover Top Style: PlainBaffled: Yes
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Holley Sniper 820031 EFI Sheet Metal Intake Manifold 92mm, Silver
$579.99
Chevy LS V8, EFI Fuel System Type, Anodized, Silver
On Sale
Fuel System Type: EFIInjection Style: Multi-portIntake Manifold Type: Hi-RamRPM Range: 2,200-6,800
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Holley Sniper 550-512 EFI Super 1250 4-Barrel Self-Tuning Kit
$1,552.99
Universal Fit, Throttle Body Injection Style
Video Available
Injection Style: Throttle BodyInjectors Included: YesInjector Size: 100 lb/hr at 58.5 PSICFM: 800 CFM
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Holley Sniper 550-869K EFI Quadrajet Master Kit, Gold Finish
$1,499.99
Universal Fit, Throttle Body Injection Style, Gold
Video Available
Injection Style: Throttle BodyUser Tunable : YesSelf Tuning: YesCarburetor Flange Type: 4-Barrel Spread Bore
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Holley 550-513 EFI 4150 Super Sniper Carburetor, 1250 HP
$1,552.99
Universal Fit, Throttle Body Injection Style
New Product
Injection Style: Throttle BodyEGR: NoThrottle Body Material: Cast AluminumCarburetor Flange Type: 4-Barrel Square Bore
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Holley Sniper 890009B Fabricated Valve Covers, 1987-97 SBC, Black
$154.99
305, 350, Tall Valve Cover Height, Aluminum
On Sale
Valve Cover Height: TallValve Cover Mounting Style: Center BoltValve Cover Top Style: PlainMaterial Type: Aluminum
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Holley Sniper 890007 Fabricated Valve Covers, 1968-97 BBF, Silver
$137.99
429, 460, Stock Valve Cover Height, Baffled, Natural
On Sale
Valve Cover Height: StockValve Cover Mounting Style: Perimeter BoltValve Cover Top Style: PlainBaffled: Yes
Compare
Holley Sniper 825072 Sheet Metal Intake Manifold, SBC, Black
$492.99
262, 265, 283, 302, 305, 307, 327, 350, 400, Anodized
On Sale
Fuel System Type: CarburetedIntake Manifold Type: Tunnel RamCarburetor Quantity: TwoCarburetor Flange Type: 4-Barrel Square Bore
Compare
Holley Sniper 8600041-1 EFI Throttle Body, LS, Black, 92mm
$181.99
1-Barrel Throttle Body Barrels, Anodized, Black
On Sale
Throttle Body Barrels: 1-BarrelThrottle Body Bore Size: 92mmThrottle Body Flange Type: LS 4-BoltThrottle Body Material: Billet Aluminum
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Holley Sniper 827011 Sheet Metal Intake Manifold, Ford 289-302
$469.99
260, 289, 302, Carbureted Fuel System Type, Anodized
On Sale
Fuel System Type: CarburetedIntake Manifold Type: Tunnel RamCarburetor Quantity: OneCarburetor Flange Type: 4-Barrel Square Bore
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Carburetors have been the core of automotive industry as well as its aftermarket, performance and racing segments for over a century. Their successor – the Electronic Fuel Injection (EFI) burst onto the scene in the 1980s and by mid 1990 had become the industry’s main fuel delivery system.
The old faithful carburetor hasn’t disappeared though, it continues to be the preferred choice within certain automotive markets like the muscle car and hot rod community.
Carburetors continue to be popular among the muscle car and hot rod enthusiasts.
While today’s traditional car builders, racers and restorers are comfortable with technology, it still takes a big leap of faith for someone who has spent decades changing jets and turning mixture screws to start tuning with a laptop computer.
The aim of this article is to demystify EFI and explain how it differs from a carburetor.
How EFI works
An EFI system consists of a fuel pump, fuel injectors, sensors and an Engine Control Unit (ECU). Fuel gets pumped up from the tank via a fuel pump out to a fuel injection rail, then into individual injectors which are inserted directly into the intake manifold. The fuel injectors are controlled by the ECU.
Fuel injectors are mounted in the intake manifold and are controlled by the ECU.
How ECU works
A number of sensors plugged into the ECU monitor all important engine data. Things like air temperature, manifold pressure, throttle position, RPM are all collected and analyzed by the ECU in order to determine how much fuel to supply to the engine.
An ECU like Haltech’s Elite shown here, monitors all the sensors and controls the amount of fuel provided to the engine.
Tuning with EFI
EFI tuning is done on a laptop via a dedicated ECU software. Rather than adjusting carburetor jets, the tuner customises “fuel maps” which tell the ECU when, how and how much fuel to provide to the engine. This allows the tuner to map fuel delivery throughout the entire rev range.
A fuel map allows the tuner to specify the exact amount of fuel throughout the entire rev range.
Advantages of an EFI system
Because the ECU constantly monitors all the sensors, an EFI system is infinitely more tuneable than a carburetor. No more stuck float bowls after winter, no more flooded engines on cold mornings, no more fouled plugs, no more rough idle or vapor locks on hot days. These things are all a distant memory with EFI.
As an EFI system is controlled by one, single box, its wiring is also simpler and safer.
Pro Mod racer Bill Lutz successfully uses Haltech’s ECU system on his twin turbo Camaro.
The benefits for racers are even more impressive; data display and logging, multi stage dry nitrous injection control, boost mapping, traction control, knock control, launch control and anti-lag, even engine shutdown protection are all available to an EFI tuner.
Mike Jovanis uses a Haltech ECU in his NMRA True Street turbo Mustang.
Upgrading from carburetor to EFI
While every EFI setup is different, a basic upgrade involves replacing the carburetor with a throttle body and installing injectors in the intake manifold. The next step is to install all the necessary sensors (a common install includes an oxygen, manifold pressure, air temperature, coolant temperature and throttle position sensor). All the sensors are then connected to the ECU and the system is ready to tune.
A carburetor sitting atop an inlet manifold is soon to be replaced by….
Why go with Haltech?
Haltech is a world leader in engine management technology and we are focused on not only providing user-friendly products but also educating the users on how to get the most out of their systems.
Haltech ECUs are at the cutting edge of EFI technology proving their worth at race tracks and drag strip around the world.
Haltech’s technical support is second to none and backed by an extensive online knowledge base. We don’t just sell products, we stand behind them and support their users.
Street Outlaws’ Dominator is one of the most recent converts to Haltech and EFI.
In order to move up the list, Dominator’s old system (above) had to be upgraded to EFI.
With a little help from Haltech tech crew, Joe’s car was transformed into a fire breathing, high-tech, EFI monster.
Eset internet security 11.2.49.0 key. Brand new throttle bodies replace the old carburetor.
The new setup also included a multi-stage, ECU-controlled dry Nitrous injection.
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In the video below Matt explains the basics of a carburetor system and compares them to those of an EFI fuel delivery method.
Want to know more?
Go to Haltech’s YouTube Channel
Go to Haltech’s Tech Forum Go to Haltech’s Facebook Page Submit a Product Enquiry Comments are closed.
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