Holly Sniper EFI Holley Rochester™ Quadrajet® (Q-Jet™), Classic Gold 550-869

Are you tired of rebuilding the 50+ year old Rochester™ Quadrajet® (Q-Jet™) on your classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Introducing Sniper EFI Quadrajet™. The first bolt-on spread bore electronic fuel injected throttle body system that 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 such as; four 100lb/hr Injectors, built-in timing control, a 3.5" full-color touchscreen, and much more! The throttle body will support up to 500 horsepower naturally aspirated. In addition to all of these great tried and true features, 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 appearing installation!

• Supports up to 500hp with Four 100 Lb/Hr Injectors!
• Designed to deliver the signature Rochester Roar at Wide Open Throttle!
• Requires external fuel pressure regulator, such as: 12-886 or 12-879
• Universal Throttle and transmission kickdown bracket included
• Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4
• The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
• Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
• OEM Style Throttle Position Senser (TPS)/ and Idle Air Control (IAC) for years of dependable service.
• Fits most stock Rochester Quadrajet™ (Q-Jet) air cleaners
• Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
• Patent Pending
• Included clamp-on oxygen sensor kit ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
• Throttle body mounted ECU – no extra boxes to mount
• Available in 3 Finishes - Classic Gold, Shiny and Black Ceramic
• Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions!
• High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays.
• A Flame Arrestor is REQUIRED for marine installations, such as part number, 720-1 or 720-13
• Integrated ignition timing control
• Brake Booster adapter included, 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!