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Holley Sniper EFI 550-510-3AX Holley Sniper 2 EFI - Polished Holley Sniper EFI 550-510-3AX
$1,249.95
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...
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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. 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. Want to make the switch from the original Sniper EFI to Sniper 2 and don't want to rewire your system? The new Sniper 2 upgrade kits are designed to do exactly that! Included with each Sniper 2 Plug and Play upgrade system is an adapter solution that connects your existing Sniper EFI wiring harness to a Sniper 2 throttle body in minutes. Simply remove your Sniper EFI throttle body from the intake manifold, unplug all connectors, reinstall the Sniper 2 throttle body, and plug the Sniper EFI 2 adapter harness into your existing main harness. Cycle your ignition key, run a fresh wizard on the display of your choice, and enjoy the benefits of Sniper 2 EFI. 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.
Specifications:
| 10429 | No |
| 10431 | No |
| Brand | Holley Sniper EFI |
| 10423 | Yes |
| Category | Air and Fuel Delivery |
| CFM | 800 |
| Coast Guard Approved | No |
| 10438 | No |
| 10430 | Yes |
| 10437 | No |
| Distributor Included? | No |
| 10442 | No |
| 10418 | No |
| 10428 | No |
| Emission Code | 3 |
| Finish | Shiny |
| Flange Style | 4150 |
| Forced Induction HP@60PSI | 575 |
| 10433 | Yes |
| 7246 | No |
| 10417 | No |
| 906 | Yes |
| Fuel Pressure | 58.5 PSI |
| Fuel Pressure Regulator | No |
| 10425 | No |
| 8922 | No |
| Fuel System | Not Included |
| 3390 | Performance |
| Height | 3.28" |
| 10422 | Yes |
| 10432 | No |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet / Outlet Size | 9/16-18 Female O-Ring (AN 6) |
| 9780 | No |
| 10427 | No |
| MAP Sensor | 2 |
| Max Horsepower Rating | 650 Naturally Aspirated |
| Model | 4150 EFI Conversion Throttle Body |
| 10420 | No |
| Naturally Aspirated HP@60PSI | 650 |
| part type | Fuel Injection Conversion Kit |
| PDM | No |
| Power Distribution Module | No |
| Product Type | Sniper EFI |
| 10421 | No |
| 10434 | Yes |
| Sub Category | Service Kits |
| 918 | Yes |
| 10426 | No |
| Transmission | All |
| User Interface | 3.5 in Handheld |
| 10435 | Yes |
| Warning | California Proposition 65 |
| Warranty | Two Year Standard, Extended Via Product Registration |
| 10419 | No |
| Description_ABR | SNIP FICK |
| Description_SHO | EFI Polished Base |
| Description_INV | SNIPER 2 UPGRADE KIT POLISHED |
| Description_DES | Holley Sniper 2 EFI - Polished |
| Description_EXT | Base Sniper 1 to Sniper 2 Upgrade Kit |
| Description_MKT | 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. 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. Want to make the switch from the original Sniper EFI to Sniper 2 and don't want to rewire your system? The new Sniper 2 upgrade kits are designed to do exactly that! Included with each Sniper 2 Plug and Play upgrade system is an adapter solution that connects your existing Sniper EFI wiring harness to a Sniper 2 throttle body in minutes. Simply remove your Sniper EFI throttle body from the intake manifold, unplug all connectors, reinstall the Sniper 2 throttle body, and plug the Sniper EFI 2 adapter harness into your existing main harness. Cycle your ignition key, run a fresh wizard on the display of your choice, and enjoy the benefits of Sniper 2 EFI. 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. |
| Description_FAB | Supports up to 650hp naturally aspirated or 575hp on boost with four 100 lb/hr injectors Improve your ride with the benefits of Sniper 2, including wireless connectivity (coming late 2023), smoother throttle feel, improved RF interference resistance, hidden wiring harness and more Reuses existing coolant temperature and wideband oxygen sensors (NEW) Cast-in fuel crossover from the primary to secondary fuel rail (NEW) Sniper 2 throttle bodies are serialized in house, which provides each unit a birth certificate for an improved customer service and warranty experience in the event of any unit needing to be inspected Additional Features (NEW) Next Generation mil-spec style M8 positive lock connector for CAN1 and CAN2 provides the latest in CAN bus technology for a simple yet robust connection Available with fuel system kits: that include an adjustable external regulator, fittings, and a 3’ section of fuel hose, allowing you to easily mount your regulator in the engine bay (NEW) “Hidden Harness” wiring harnesses exits from the rear of throttle body for a clean appearance Eliminates the need to rewire your existing Sniper EFI installation - one step, plug and play upgrade to a Sniper 2 throttle body (NEW) Inputs and outputs consist of: 2x Ground Inputs, 2x Ground Outputs, 1x TPS output (0-5v), and 1x Tach Output (NEW) Onboard contactless magnetic TPS sensor ensures an accurate TPS reading All new design – the #1 EFI Conversion just got better! Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires) Sniper 2 is Part of the Sniper EFI Complete Ecosystem Redesigned throttle shaft and plate geometry for a smoother throttle feel Main Features Four total kits available – polished and black, with or without external fuel pressure regulator (required for Sniper 2) (NEW) Integrated transmission kick down provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications 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) Redesigned injector connector for improved reliability Update your Sniper EFI to the new, improved Sniper 2 in less than one hour! Patent Pending |
Shipping Information
We offer FREE shipping on all orders within Canada. Most orders ship within 1-2 business days.
Standard delivery typically takes 3-7 business days depending on your location.
Returns Policy
We accept returns within 30 days of purchase. Items must be in original condition with all packaging.
For returns or exchanges, please contact our customer service team.

