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.
| 10429 |
No |
| 10431 |
No |
| Brand |
Holley Sniper EFI |
| 10423 |
No |
| Category |
Air and Fuel Delivery |
| CFM |
715 |
| Coast Guard Approved |
Yes |
| 10438 |
No |
| 10430 |
Yes |
| 10437 |
No |
| 10442 |
Yes |
| 10418 |
No |
| 10428 |
No |
| Emission Code |
3 |
| Finish |
Classic Gold |
| Flange Style |
Spreadbore |
| 10433 |
Yes |
| 7246 |
No |
| 10417 |
No |
| 906 |
Yes |
| Fuel Pressure |
58.5 PSI |
| 10425 |
No |
| 8922 |
No |
| 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 |
500 Naturally Aspirated |
| 10420 |
Yes |
| part type |
Fuel Injection Conversion Kit |
| Product Type |
Sniper EFI Quadrajet |
| 10421 |
Yes |
| 10434 |
Yes |
| Sub Category |
Service Kits |
| Throttle Bore |
1.375 Primary / 2.00 Secondary |
| 918 |
Yes |
| 10426 |
No |
| Transmission |
700R4/200R4 |
| 10435 |
Yes |
| Warning |
California Proposition 65 |
| 10419 |
Yes |
| 10429 |
No |
| 10431 |
No |
| Brand |
Holley Sniper EFI |
| 10423 |
No |
| Category |
Air and Fuel Delivery |
| CFM |
715 |
| Coast Guard Approved |
Yes |
| 10438 |
No |
| 10430 |
Yes |
| 10437 |
No |
| 10442 |
Yes |
| 10418 |
No |
| 10428 |
No |
| Emission Code |
3 |
| Finish |
Classic Gold |
| Flange Style |
Spreadbore |
| 10433 |
Yes |
| 7246 |
No |
| 10417 |
No |
| 906 |
Yes |
| Fuel Pressure |
58.5 PSI |
| 10425 |
No |
| 8922 |
No |
| 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 |
500 Naturally Aspirated |
| 10420 |
Yes |
| part type |
Fuel Injection Conversion Kit |
| Product Type |
Sniper EFI Quadrajet |
| 10421 |
Yes |
| 10434 |
Yes |
| Sub Category |
Service Kits |
| Throttle Bore |
1.375 Primary / 2.00 Secondary |
| 918 |
Yes |
| 10426 |
No |
| Transmission |
700R4/200R4 |
| 10435 |
Yes |
| Warning |
California Proposition 65 |
| 10419 |
Yes |
| Description_ABR |
Quadrajet |
| Description_SHO |
Quadrajet Classic |
| Description_INV |
SNIPER QUADRAJET, GOLD |
| Description_ASC |
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. |
| Description_DES |
Holley Sniper EFI Quadrajet™ - Classic Gold |
| Description_EXT |
Supports Up To 500 HP - 3.5 in. LCD Touchscreen - For Spreadbore Manifold |
| Description_MKT |
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. |
| Description_FAB |
Fits most stock Rochester Quadrajet™ (Q-Jet) air cleaners |
| Description_FAB |
Certified to ISO 8846, SAE J1171, and United States Coast Guard Requirements for Ignition Protection and Fire Resistance |
| Description_FAB |
3.5” LCD handheld touchscreen for setup, tuning, gauge displays, and other viewing parameters |
| Description_FAB |
Integrated ignition timing control when paired with HyperSpark line of distributors and ignition components, along with Holley Dual Sync |
| Description_FAB |
Fuel pump outlet wire with built in relay to directly power the fuel pump |
| Description_FAB |
Initial handheld calibration wizard creates a base tune with no laptop needed |
| Description_FAB |
Included universal throttle, transmission kickdown bracket, and brake booster adapter |
| Description_FAB |
Bosch LSU 4.9 Wideband Oxygen (O2) Sensor for maximum performance on real time fuel map learning |
| Description_FAB |
Designed to deliver the signature Rochester Roar at wide open throttle (WOT) |
| Description_FAB |
Built in Manifold Air Pressure (MAP) and Inlet Air Temperature (IAT) sensors automatically adjust to the changing conditions |
| Description_FAB |
(4) 100 lb./hr. fuel injectors and 715 CFM throttle body supporting up to 500 HP naturally aspirated |
| Description_FAB |
Throttle body mounted ECU for a cleaner engine bay |
| Description_FAB |
3 ground trigger outputs to control accessories such as cooling fans, AC, etc. |
| Description_FAB |
Simple installation with only (4) wires including Battery+, Battery-, 12V switched ignition, and RPM signal |
| Description_ABR |
Quadrajet |
| Description_SHO |
Quadrajet Classic |
| Description_INV |
SNIPER QUADRAJET, GOLD |
| Description_ASC |
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. |
| Description_DES |
Holley Sniper EFI Quadrajet™ - Classic Gold |
| Description_EXT |
Supports Up To 500 HP - 3.5 in. LCD Touchscreen - For Spreadbore Manifold |
| Description_MKT |
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. |
| Description_FAB |
Fits most stock Rochester Quadrajet™ (Q-Jet) air cleaners |
| Description_FAB |
Certified to ISO 8846, SAE J1171, and United States Coast Guard Requirements for Ignition Protection and Fire Resistance |
| Description_FAB |
3.5” LCD handheld touchscreen for setup, tuning, gauge displays, and other viewing parameters |
| Description_FAB |
Integrated ignition timing control when paired with HyperSpark line of distributors and ignition components, along with Holley Dual Sync |
| Description_FAB |
Fuel pump outlet wire with built in relay to directly power the fuel pump |
| Description_FAB |
Initial handheld calibration wizard creates a base tune with no laptop needed |
| Description_FAB |
Included universal throttle, transmission kickdown bracket, and brake booster adapter |
| Description_FAB |
Bosch LSU 4.9 Wideband Oxygen (O2) Sensor for maximum performance on real time fuel map learning |
| Description_FAB |
Designed to deliver the signature Rochester Roar at wide open throttle (WOT) |
| Description_FAB |
Built in Manifold Air Pressure (MAP) and Inlet Air Temperature (IAT) sensors automatically adjust to the changing conditions |
| Description_FAB |
(4) 100 lb./hr. fuel injectors and 715 CFM throttle body supporting up to 500 HP naturally aspirated |
| Description_FAB |
Throttle body mounted ECU for a cleaner engine bay |
| Description_FAB |
3 ground trigger outputs to control accessories such as cooling fans, AC, etc. |
| Description_FAB |
Simple installation with only (4) wires including Battery+, Battery-, 12V switched ignition, and RPM signal |
