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