Sniper EFI Quadrajet Self-Tuning Fuel Injection System

Fits: Universal, Gasoline, Black

Maximum Horsepower with Gas:500

Injection Style:Throttle body

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:Satin black

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 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 ECU–no 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 own—no 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

* United States Coast Guard approved (certified to ISO 8846, SAE J1171 requirements)

* Available in three finishes--Classic Gold, Shiny, and Black Ceramic