SKU: 89317424536

Holley Sniper 2 EFI 4BBL Self Tuning Base Kit, Black (HO550-511-3XX)

Sale price$1490.40 Regular price$1656.00
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Description

Holley Sniper 2 EFI 4BBL Self Tuning Base Kit, Black (HO550-511-3XX)HO550 511 3XX HOLLEY SNIPER 2 EFI BLACK 800 cfm 4 Injector Throttle Body, 650 HP N A Part Number: HO550 511 3XX The #1 EFI conversion system just got better! Introducing Sniper 2 EFI a self tuning, easy to install, EFI conversion for common 4 barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI conversion more simple, reliable, and modern. Like

HO550-511-3XX - HOLLEY SNIPER 2 EFI BLACK

800 cfm 4 Injector Throttle Body, 650 HP N/A

Part Number: HO550-511-3XX

The #1 EFI conversion system just got better! Introducing Sniper 2 EFI - a self-tuning, easy-to-install, EFI conversion for common 4-barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI conversion more simple, reliable, and modern. Like all Sniper EFI systems, Sniper 2 is designed to work with the Sniper Ecosystem that includes Hyperspark ignition, complete fuel systems, multiple user interfaces/dash displays, and more.
New for Sniper 2 is the optional Power Distribution Module (PDM). This cost-effective and optional accessory isolates the core of your EFI and ignition wiring into one, easy-to-use location. Simply slide the stripped wire ends under the positive lock connector and tighten down the set screw. Battery and a switched 12-volt source is all that's required from your vehicle to power the PDM and your Sniper EFI.
Make your classic drive like a modern fuel-injected vehicle, including easy cold starts, smooth drivability, and improved fuel economy! Sniper 2 is designed to be installed at home in your garage with limited tools and the support of Holley's comprehensive installation manual and videos. The user-friendly setup wizard allows you to answer a few simple questions about your engine and the system will begin self-tuning with no laptop or tuning experience required.
If you're looking for a high-performance fuel injection system that delivers power, efficiency, and ease of use, look no further than the Sniper 2 EFI.
Main Features
All new design – the #1 EFI Conversion just got better!
Only four wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
Calibration wizard only requires that you answer a few simple questions about your engine to create a base map and begin self-tuning – No laptop required
Supports up to 650hp naturally aspirated or 575hp on boost with four 100 lb/hr injectors
NEW Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)
NEW Redesigned throttle shaft and plate geometry for a smoother throttle feel

Sniper 2 is Part of the Sniper EFI Complete Ecosystem

Sniper 2 is compatible with the complete Sniper EFI Ecosystem that includes plug-n-play Hyperspark Ignition systems (coil, ignition box and distributor), fuel systems (fuel lines, fuel pump hangers), multiple displays and more
NEW Main harness includes plug-and-play HyperSpark distributor support, for integrated timing control, making your ignition setup hassle free
NEW Adaptors for other ignition types sold separately: 558-329 CD Box to Sniper 2, 558-330 MSD Pro Billet / Crank Trigger to Sniper 2
NEW Wide Variety of tuning and gauge display interfaces: from a 3.5-inch full color LCD Handheld, 5-inch Digital Dash, or the Bluetooth dongle, which allows you to connect either an iOS or Android based cell phone to your Sniper 2
NEW Optional Power Distribution Module (PDM) further simplifies wiring, especially when used in conjunction with an ignition system
Available with fuel system kits: a complete fuel system consisting of: 20 ft. of 3/8 in. Vapor Guard Fuel Hose, Fuel Pump, fuel pressure regulator, filters, necessary hardware, and bulkhead fitting to return fuel into the tank

Additional Features
NEW Integrated transmission kick down provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications
NEW "Hidden Harness" wiring harnesses exits from the rear of throttle body for a clean appearance
NEW Inputs and outputs consist of: 2x Ground Inputs, 2x Ground Outputs, 1x TPS output (0-5v), and 1x Tach Output
NEW Redesigned injector connector for improved reliability
NEW Onboard contactless magnetic TPS sensor e

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 89317424536

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4.4 ★★★★★
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Melissa
Lake Worth, US
★★★★★ 5
Don't wait. Just get the press.
Color: Purple
Incredibly easy to use. Heats up perfectly and I love the auto press. I wish I would have invested in this sooner.
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Reviewed in the United States on May 26, 2026
J
Verified Purchase
Jennai Patterson
San Leandro, US
★★★★★ 5
Small, light and works SO well! I'm floored!!!
Color: Purple, Color: Purple
I am floored by this heat press! I have a more expensive brand but it's so large and heavy. I wanted something that was portable enough to take to craft shows. I thought, what the heck, worst thing is I send it back. Thank is NOT happening! HTVRONT brings it again! This press is SO light. I was worried about it easily sliding around. NOPE, they put suction cup feet on the bottom! The top handle folds back for ease of use, so you can postion your hat any way you like. It has the standard pull bar to pull the hat snug onto the press. Once you bring the top forward the bottom platen then raises up to press the hat against the top platen (when you push "play" to start the pressing. It doesn't do it untiol you want it to.) I was able to press the stanrd area of the front, but also was easily able to press the bill and the side of the hat as well. It came with two platens which is very nice as well. It also heats up quickly. Initially, the top took a bit of force to push backwards, but it loosened up very quickly. This is SO small and light as well. You can store it just about anywhere. It's not much bigger than a loaf of bread. I am THRILLED!
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Reviewed in the United States on April 12, 2026
B
Verified Purchase
bri
Houston, US
★★★★★ 5
Easy to use
Color: Blue
Great press. Easy to use. Get very hot, great pressure, durable.
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Reviewed in the United States on May 23, 2026
R
Verified Purchase
RayRay
Lexington, US
★★★★★ 5
Outstanding hat press
Color: Blue
This hat press is amazing! Took not time at all to make 14 hats for a family event. ZERO problems. It was so easy to use. I highly recommend this press over others. Worth every penny.
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Reviewed in the United States on February 16, 2026
L
Verified Purchase
Lisa
San Leandro, US
★★★★★ 5
Love this machine!
Color: Blue
The sturdiness is great, I love the size.. it is worth the value fir the money and the heat transfer works perfectly!
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Reviewed in the United States on March 4, 2026

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