Holley 550-870 Sniper Stealth 4150 Self-Tuning Fuel Injection System
510-550-870
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Base Kits
Holley 550-870 Sniper Stealth 4150 Self-Tuning Fuel Injection System Master Kit Features:
- Holley 4150 flange EFI carburetor replacement
- Supports up to 650 naturally aspirated HP or 600 forced-induction HP using (4) 100 lbs./hr Injectors
- 870 CFM flow rate
- All system wiring exits below the rear fuel injector cover, for a complete stealth installation and appearance
- 2.5 Bar MAP sensor
- Integrated ignition timing control
- Throttle body mounted ECU
- (4) wiring connections required (Battery +, Battery -, Ignition, RPM)
- High-resolution color touchscreen controller
- Calibration wizard tunes ECU without the use of a computer or extensive engine tuning knowledge
- Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learn
- OEM-style throttle position sensor (TPS) and idle air control (IAC)
- 2.500 in. clamp-on oxygen sensor kit allows easy integration into older exhaust systems
- 3.280 in. overall height
- -8 AN (3/4-16) female O-ring inlet/outlet
- Kickdown provisions for GM: TH350, TH400, 200R4, 700R4 Ford: C4, C6
- Compatible with Holley Ultra XP Carburetor drop base air cleaners as well as most stock-style air cleaners with air cleaner locator provisions
Installation Notes:
- Requires a Holley 510-12-886 external fuel pressure regulator (set to a base pressure of 58.5 PSI)
- Use 510-534-247 high-pressure fuel log for simpler installation
- For Troubleshooting Tips setting up your New Holley Sniper EFI System, please see this helpful video from Holley Performance.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Specifications:
Does this system require a minimum vacuum pressure to function properly?
Will this work with E85 fuel?
Can I use my msd 8360 distributor and 6a box with this system? Will it intergrate to control timing ? Thx
will u need a bigger fuel pump for more fuel pressure
Will this work on a 5.3 ls1 with a th350 auto transmission
Can I run this returnless. Useing the. Returnless 12 bolt fuel cell module.
Will this work in a Big Block Chevy 468 ci with a Healy camshaft? 248 252 duration at .50 lift?
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.