Part # 550-869
$2,024.95
The Sniper EFI Quadrajet™ is here to help with classic installs, perfect for not having enough hood clearance to mount an adapter or don’t want to replace your OEM spread bore intake. Our bolt-on spread bore electronic fuel injected throttle body system does not require any additional adapters, sealing plates, or intake manifold swaps. The Sniper EFI Rochester™ Quadrajet™ (Q-Jet) system retains the same great features as the 4150 Sniper EFI version with (4) 100 lb./hr. fuel injectors, built-in timing control, 3.5" LCD touchscreen, and much more. For power, this throttle body will support up to 500 HP naturally aspirated. In addition, the Sniper EFI Rochester™ Quadrajet™ (Q-Jet) system will fit most stock air cleaners and offers multiple fuel inlet configurations that allow for a stock appearance installation. After you’ve installed your EFI, use our included 3.5" handheld to answer a few simple questions and your system will begin to self-tune with no laptop required. This can also be installed on marine applications, please refer to Tech Resources section for more information on the correct and safest way to install.
Features & Benefits
Integrated ignition timing control when paired with HyperSpark line of distributors and ignition components, along with Holley Dual Sync
Fits: Supports Up To 500 HP - 3.5 in. LCD Touchscreen - For Spreadbore Manifold
Installation note: For marine installations, a flame arrestor is legally required. We recommend Holley P/N 720-1 or 720-11 Flame Arrestor, along with Holley P/N 720-31 or 720-33 Flame Arrestor Vent Tube to ensure proper function, safety, and compliance.
In the box: Fuel Injectors, Throttle Position Sensor
| Accelerometer Support | No |
| Boost Control | No |
| CAN-BUS Support | No |
| CFM | 715 |
| Coast Guard Approved | Yes |
| Coil Per Cylinder Ignition Support | No |
| Datalogging Support | Yes |
| Dry Nitrous Control | Yes |
| EGT Support | No |
| Finish | Classic Gold |
| Flange Style | Spreadbore |
| Forced Induction Support | Yes |
| Fuel Pressure | 58.5 PSI |
| Height | 3.28" |
| Ignition Timing Control | Yes |
| Individual Cylinder Fuel Corrections | No |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet / Outlet Size | 9/16-18 Female O-Ring (AN 6) |
| Knock Retard Support | No |
| MAP Sensor | 2 Bar |
| Max Horsepower Rating | 500 Naturally Aspirated |
| Multi-Stage Nitrous Control | Yes |
| Progressive Nitrous Control | Yes |
| Self-Tuning | Yes |
| Throttle Bore | 1.375 Primary / 2.00 Secondary |
| Traction Control Support | No |
| Transmission | 700R4/200R4 |
| User-Tuneable | Yes |
| Wet Nitrous Control | Yes |
| e85 Support | No |
The EFI Brain
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