Daisy
Last Updated: Jul 19, 2026
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| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Trends Auto | 9.83 | ❌ | ❌ | ❌ |
Brand New Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish, 4 Barrel Fuel Injection Conversion - Self Tuning Kit plus Handheld EFI Monitor. (Part #550-511)
Holley just brought EFI within range! Introducing Sniper EFI! It's economically priced so you can have all the benefits of EFI and still have money to finish or upgrade the rest of your ride! Perfect for street rods, muscle cars, off road trucks or nearly any carbureted vehicle. Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today!
Specs: CFM: 800 | Coast Guard Approved: Yes | Finish: Black | Flange Style: Dual Bolt Pattern | Fuel Pressure: 58.5 PSI | Height: 3.28" | Injector Size: 100 lb./hr @58.5 PSI
Inlet/Outlet Size: 9/16-18 Female O-Ring (AN 6) | MAP Sensor: 2Bar | Max Horsepower Rating: 650 Naturally Aspirated | Model: 4150 EFI Conversion Throttle Body | Product Type: EFI | Transmission: 700R4/200R4
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Southwest Speed ✅ | 9.64 | ❌ | ❌ | ❌ |
Brand New Holley Sniper EFI Autolite 1100 Electronic Fuel Injection, Gold Finish, 175 Horsepower (Holley Part #550-552)
Sniper EFI replacement throttle body for Autolite 1100 carburetors will be right at home on most early in-line 6 cylinder powered grocery getters or weekend cruisers. Sniper EFI offers superior throttle response and wide-open throttle power. Put an end to cold start issues, hesitations, vapor lock, and flooding.
Features: Bolt-On Sniper EFI throttle body replacement for Autolite 1100 Carburetors | Designed with a mounting flange to fit the intake manifolds that originally had Autolite 1100 carburetors installed. Compatible with 1963-1967 Inline 6 Cylinder F𐐬rd engines 144-300ci | Such engines were commonly found in Mustang, Falcon, Fairlane & various F𐐬rd trucks | Throttle body mounted ECU - no extra boxes to mount | Supports up to 175 HP with One 100lb/hr Injector
Only 4 Wiring Connections Required (Battery +, Battery - , Switched Ignition & RPM) | Internal fuel pressure regulator eliminates the hassle1212 of plumbing an external fuel pressure regulator (Preset to 58.5 PSI) | Integrated ignition timing control | High Res Full Color Touchscreen for Initial Setup, Tuning & Gauge Displays | Simple Calibration Wizard - NO laptop required! | Self-tuning ECU means you do not have to be a computer/tuning wiz to have EFI
Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn | OEM Style TPS/IAC and Fuel Pressure regulator | Included clamp-on oxygen sensor kit for 2" exhaust ensures a leak free oxygen sensor install, with Stainless Steel T-Bolt clamps & Stainless Steel (Weldable) oxygen sensor flange
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Southwest Speed ✅ | 9.63 | ❌ | ❌ | ❌ |
Brand New Holley Terminator Stealth EFI Kit with GM Transmission Control, 4 BBL Throttle Body Fuel Injection System, Polished, 950 CFM, Fits V8 250-600 HP Engines (Holley Part #550-442)
Features: Carburetor looks with the drivability of EFI | Trouble-free performance with today’s fuels - put an end to vapor lock and fuel varnish problems | Fits V8 engines from 250-600 horsepower | 4150 style 4BBL mounting flange - Bolts on in place of carburetor | Fully self-tuning ECU - No laptop required | Includes full color, 3.5” touch screen LCD for both basic and advanced tuning options | Timing control option for GM Small Cap HEI and Ford TFI distributors |
Connections for Ford, GM TH350, 700R4 and other transmission linkages | Optional free software upgrade for full laptop control | Easy plug and play harnesses with minimal connections | Virtually maintenance free - keeps your vehicle reliable and ready to drive
Specs: Brand: Holley EFI | CFM: 950 | Emission Code: 3 | Finish: Polished | Flange Size: 4150 | Fuel Pressure: 43 PSI | Height: 3.25" | Injector Size: 80 lbs./Hr at 43 PSI | Product Type: Stealth Terminator Kit | Throttle Bore: 1.750"
Have you been hesitant on switching to EFI because you like the traditional look of a carburetor? Do you have a GM 4L60/80E Transmission in your hotrod? Holley has you covered with the new Terminator Stealth Throttle Body Fuel injection System. Now you can have all of the benefits of EFI, yet maintain the traditional looks of a carburetor. The Holley Terminator Stealth EFI systems have the same great self-tuning features of our Terminator EFI in a new stealthy package!
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Southwest Speed ✅ | 9.63 | ❌ | ❌ | ❌ |
Brand New Holley EFI Terminator X Max GM Gen V LT Late Direct Injection Kit with GM LT Drive-by-Wire Throttle Body Control & GM 4L60/4L80 Transmission Control, 3.5" Touch Screen (Holley Part #550-1631)
Do not settle for a factory ECU with a cumbersome tuning interface when you can have technology of Holley EFI. Features real-time fuel learn, an integrated 1bar MAP sensor & 4 programmable inputs & outputs. Inputs & outputs are ideal for electric fans, boost control solenoids, progressive nitrous control & more.
Terminator X comes fully loaded with base maps for common LT engine combinations. 3.5" touch screen LCD handheld contains an easy to use calibration wizard as well as tuning & gauge display functions. Kits will come with an external Gasoline Direct Injection Controller, enabling users to control & tune, factory injectors, GM Gen V LT Variable Valve Timing (VVT) & factory fuel pumps.
Also included is Holley EFI software suite that allows full laptop access for advanced users. Whether you are building, an LT swapped budget beater or a boosted racecar, Terminator X has the features & technology you need at a price that will not break the bank!
To identify if your engine is an early or late application, refer to your fuel pressure sensor, located behind the intake manifold. Early sensors have a 4-pin connector, whereas late sensors have a 3-pin connector. This will help you pick which kit you require for your engine.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Southwest Speed ✅ | 9.64 | ❌ | ❌ | ❌ |
Brand New Holley Sniper EFI Self-Tuning Kit - Gold Ceramic Finish, 4 Barrel Fuel Injection Conversion - Self Tuning Kit plus Handheld EFI Monitor. (Part #550-516)
Holley just brought EFI within range! Introducing Sniper EFI! It's economically priced so you can have all the benefits of EFI and still have money to finish or upgrade the rest of your ride! Perfect for street rods, muscle cars, off road trucks or nearly any carbureted vehicle. Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today!
Specs: CFM: 800 | Coast Guard Approved: Yes | Emission Code: 3 | Finish: Gold | Flange Style: Dual Bolt Pattern | Fuel Pressure: 58.5 PSI | Height: 3.28" | Injector Size: 100 lb./hr @58.5 PSI
Inlet/Outlet Size: 9/16-18 Female O-Ring (AN 6) | MAP Sensor: 2Bar | Max Horsepower Rating: 650 Naturally Aspirated | Model: 4150 EFI Conversion Throttle Body | Product Type: EFI | Transmission: 700R4/200R4
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Southwest Speed ✅ | 9.63 | ❌ | ❌ | ❌ |
Brand New Holley Sniper EFI 4150 2X4 1250 HP Throttle Body 4 Barrel Fuel Injection System, Polished (Holley Part #550-527)
Specs: Brand: Holley Sniper EFI | CFM: 1600 | Coast Guard Approved: Yes | Emission Code: 3 | Finish: Polished | Height: 3.28" | Injector Size: 100 lbs./Hr at 58.5 PSI | Max Horsepower Rating: 1250 Forced Induction | Product Type: EFI System
Introducing Sniper EFI 4150 2x4! Looking to convert your draw-through dual carbureted blower engine to EFI? Do you have a Tunnel Ram w/ dual quad carbs? Sniper EFI 4150 2x4 system from Holley features 8 - 100LB/HR Fuel Injectors capable of supporting 1250 HP on both naturally aspirated & forced induction applications.
Sniper EFI 4150 2x4 was designed for use on naturally aspirated engines, while Super Sniper EFI 4150 2x4 system was developed for both naturally aspirated & draw through supercharged applications. Every Sniper EFI can be used w/ free downloadable Sniper EFI Software, giving you unlimited control of your engine. Super Sniper EFI 2x4 comes w/ USB to CAN tuning cable allowing for live engine tuning.
NOTE: Supercharger and/or Intake Manifold not included. For fitment reference only.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| ❌ | ❌ | ❌ |
Brand New Holley Terminator Stealth EFI Kit Throttle Body Fuel Injection System, Hard Core Gray, 950 CFM, Fits V8 250-600 HP Engines (Holley Part #550-441)
Features: Carburetor looks with the drivability of EFI | Trouble-free performance with today’s fuels - put an end to vapor lock and fuel varnish problems | Fits V8 engines from 250-600 horsepower | 4150 style 4BBL mounting flange - Bolts on in place of carburetor | Fully self-tuning ECU - No laptop required | Includes full color, 3.5” touch screen LCD for both basic and advanced tuning options | Timing control option for GM Small Cap HEI and Ford TFI distributors |
Connections for Ford, GM TH350, 700R4 and other transmission linkages | Optional free software upgrade for full laptop control | Easy plug and play harnesses with minimal connections | Virtually maintenance free - keeps your vehicle reliable and ready to drive
Specs: Brand: Holley EFI | CFM: 950 | Emission Code: 3 | Finish: Hard Core Gray | Flange Size: 4150 | Fuel Pressure: 43 PSI | Height: 3.25" | Injector Size: 80 lbs./Hr at 43 PSI | Product Type: Stealth Terminator Kit | Throttle Bore: 1.750"
Looking to switch to EFI for the traditional carburetor look? Holley presents the new Terminator Stealth Throttle Body Fuel injection System. Enjoy the benefits of EFI & maintain the traditional looks of a carburetor. Holley Terminator Stealth EFI systems have the same great self-tuning features of our Terminator EFI in a new stealthy package!
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Southwest Speed | 7 |
We've carried out a comprehensive analysis of 46 reviews on fuel injection throttle body injection kits, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select fuel injection throttle body injection kits priced around $2,156.48, with top brands including and
Our team of expert editors reviewed these high-quality items and handpicked the top 7 fuel injection throttle body injection kits for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .
We are dedicated to assisting our users in finding the right kits Products based on their needs, saving them considerable time when choosing which fuel injection throttle body injection kits to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.