Holley Sniper EFI Self-Tuning Fuel Injection System Quadrajet Base # HO550-869

Fuel Injection System, Holley Sniper EFI, Spread Bore Flange, Self-Tuning, Tuning Kit, Gold Throttle Body, Kit

Injection Style:

Throttle body

Fuel Injection System Type:

Single 4-Barrel Throttle Body (Spread-Bore Flange)

Maximum Horsepower with Gas:

500

Timing Control Compatible:

Yes

Power Adder Compatible:

No

ECM Included:

Yes

Self Tuning:

Yes

User Tunable:

Yes

Fuel Pump Included:

No

EGR:

No

Transmission Controller Included:

No

Metering Style:

Speed density

Intake Manifold Included:

No

Multi-Port Fuel Rails Included:

No

Throttle Body Included:

Yes

Throttle Body Mounting Flange:

4-barrel spread bore

Venturi Quantity:

4

Venturi Diameter (mm):

34.93/51.00mm

Airflow Rate (cfm):

715 cfm

Throttle Body Material:

Cast aluminum

Throttle Body Finish:

Gold

Injectors Included:

Yes

Injector Size (lbs/hr):

100 lbs./hr.

Calibration Module Included:

Yes

Wiring Harness Included:

Yes

Oxygen Sensor Included:

Yes

Fuel Pressure Regulator Included:

No

Distributor Included:

No

MAP Sensor Included:

Yes

IAT Sensor Included:

Yes

TPS Sensor Included:

Yes

IAC Motor Included:

Yes

Quantity:

Sold as a kit.

Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection Systems

Holley Sniper EFI Quadrajet self-tuning fuel injection systems are ideal replacements when you're tired of rebuilding the 50-plus-year-old Rochester Quadrajet (Q-jet) on your classic ride. They're the first bolt-on, spread-bore, EFI throttle-body systems not requiring any additional adapters, sealing plates, or intake manifold swaps! They retain the same great features as the 4150 Sniper EFI version (four 100 lbs.-hr. injectors; built-in timing control; high resolution 3.5 in. full color touchscreen; etc.). Their throttle body will support naturally aspirated power up to 500 hp. In addition, they offer multiple fuel inlet configurations that allow for a stock-appearing installation and fit most stock air cleaners. Modernize your Q-jet-powered classic vehicle with a Holley Sniper EFI Quadrajet self-tuning fuel injection system. They are offered individually or in Master kits with external fuel pressure regulator preset to 58.5 psi, 20 ft. of 3/8 in. Vapor Guard fuel hose, fuel pump, filters, necessary hardware, and bulkhead fitting to return fuel into the tank.

Features, items, and specs:

* Designed to deliver the signature "Rochester Roar" at wide-open throttle!
* Throttle body-mounted ECUno extra boxes to mount
* Only 4 wiring connections required (battery positive and negative, switched ignition, and rpm)
* Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4
* Universal throttle and transmission kick-down bracket
* Brake booster adapter (if required)
* Simple calibration wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its ownno laptop required)
* External fuel pressure regulator preset to 58.5 psi
* 20 ft. of 3/8 in. Vapor Guard fuel hose
* Fuel pump and filters
* Necessary hardware and bulkhead fitting to return fuel to the tank
* Genuine Bosch LSU 4.9 wide-band oxygen sensor provides real-time fuel map learning
* OEM-style throttle position sensor (TPS) and idle air control (IAC) for years of dependable service
* Clamp-on oxygen sensor kit ensures leak-free oxygen sensor installation with stainless steel T-bolt clamps and weld-ready oxygen sensor flange