BRAND NEW HOLLEY SNIPER EFI STEALTH 4150 4 BBL FUEL INJECTION SYSTEM,870 CFM, POLISHED, FITS 4150 FLANGE STYLE MANIFOLDS THE SNIPER STEALTH 4150 EFI SYSTEM FROM HOLLEY FEATURES 4, 100LB/HR FUEL INJECTORS CAPABLE OF SUPPORTING UP TO 650 HP NATURALLY ASPIRATED OR 600 HP ON FORCED INDUCTION APPLICATIONS. THE SNIPER STEALTH 4150 ECU IS CAPABLE OF FUEL MAP SELF-LEARNING AND IGNITION TIMING CONTROL, IMPROVING IDLE STABILITY, DRIVABILITY, AND WIDE-OPEN THROTTLE HORSEPOWER! DID WE MENTION THAT THE STEALTH 4150 ALSO INCLUDES TRANSMISSION KICK DOWN PROVISIONS FOR GM TH350/400, 200R4/700R4 AND FORD C4/C6 APPLICATIONS. FEATURES: BOLT ON 4150 FLANGE CARBURETOR REPLACEMENT THROTTLE BODY MOUNTED ECU - NO EXTRA BOXES TO MOUNT SUPPORTS UP TO 650HP WITH FOUR 100 LB/HR INJECTORS! ALL OF THE WIRING EXITS BELOW THE REAR FUEL INJECTOR COVER, FOR A COMPLETELY STEALTH INSTALLATION TIMED SPARK PART FOR VACUUM ADVANCED DISTRIBUTORS LOCATED UNDER THE FRONT FUEL BOWL, FOR EASY ACCESS TO THE DISTRIBUTOR AIR ENTRY IS MACHINED TO FIT MOST STOCK STYLE AIR CLEANERS WITH AIR CLEANER LOCATOR PROVISIONS ONLY 4 WIRING CONNECTIONS REQUIRED! (BATTERY +, BATTERY - , SWITCHED IGNITION & RPM) EXTERNAL FUEL PRESSURE REGULATOR REQUIRED, SET TO A BASE PRESSURE OF 58.5 PSI INTEGRATED IGNITION TIMING CONTROL HIGH RESOLUTION FULL COLOR TOUCHSCREEN FOR INITIAL SETUP, TUNING, AND GAUGE DISPLAYS 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! SELF-TUNING ECU MEANS YOU DO NOT HAVE TO BE A COMPUTER/TUNING WIZ TO HAVE EFI! THE INCLUDED GENUINE BOSCH LSU 4.9 WIDEBAND OXYGEN SENSOR PROVIDES REAL-TIME FUEL MAP LEARN! OEM STYLE TPS/IAC AND FUEL PRESSURE REGULATOR, FOR YEARS OF DEPENDABLE SERVICE INCLUDED CLAMP-ON OXYGEN SENSOR KIT FOR 2.25" EXHAUST ENSURES A LEAK FREE OXYGEN SENSOR INSTALLATION, WITH STAINLESS STEEL T-BOLT CLAMPS AND A STAINLESS STEEL (WELDABLE) OXYGEN SENSOR FLANGE SPECS: BRAND: HOLLEY SNIPER EFI CFM: 870 EMISSION CODE: 3 FINISH: POLISHED FLANGE STYLE: 4150 FUEL PRESSURE: 58.5 PSI HEIGHT: 3.28" INJECTOR SIZE: 100 LB/HR @ 58.5 PSI INLET / OUTLET SIZE: 3/4-16 FEMALE O-RING (AN 8) MAP SENSOR: 2BAR MAX HORSEPOWER RATING: 650 NATURALLY ASPIRATED MODEL: 4150 EFI CONVERSION THROTTLE BODY PRODUCT TYPE: EFI TRANSMISSION: 700R4/200R4 - FORD C4/C6 - TH350 YOU CAN VIEW AND DOWNLOAD THE COMPLETE ASSEMBLY INSTRUCTION BOOKLETS FOR THIS FUEL INJECTOR HERE, AND THE QUICKSTART GUIDE HERE.