Supports Up To 500 HP - 3.5 in. LCD Touchscreen - For Spreadbore Manifold - Return Fuel System

Part Number: 550-869K

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. With the fuel kit included, you'll enure your entire system will be at peak performance.

Features and Benefits

• Transmission provisions on throttle lever for GM TH350/TH400 and 200R4/700R4
• Fuel pump outlet wire with built in relay to directly power the fuel pump
• (4) 100 lb./hr. fuel injectors and 715 CFM throttle body supporting up to 500 HP naturally aspirated
• Bosch LSU 4.9 Wideband Oxygen (O2) Sensor for maximum performance on real time fuel map learning
• Included universal throttle, transmission kickdown bracket, and brake booster adapter
• Designed to deliver the signature Rochester Roar at wide open throttle (WOT)
• 3 ground trigger outputs to control accessories such as cooling fans, AC, etc.
• 3.5” LCD handheld touchscreen for setup, tuning, gauge displays, and other viewing parameters
• Built in Manifold Air Pressure (MAP) and Inlet Air Temperature (IAT) sensors automatically adjust to the changing conditions
• Integrated ignition timing control when paired with HyperSpark line of distributors and ignition components, along with Holley Dual Sync
• Included Holley P/N 526-12 that includes a fuel pump, fuel pressure regulator, fuel filters, supply and return hose, hose fittings, clamps, and bulkhead fitting to return into the fuel tank
• Simple installation with only (4) wires including Battery+, Battery-, 12V switched ignition, and RPM signal
• Initial handheld calibration wizard creates a base tune with no laptop needed
• Throttle body mounted ECU for a cleaner engine bay
• Fits most stock Rochester Quadrajet™ (Q-Jet) air cleaners

Installing in a marine setup? Go with Holley P/N 550-869 instead.