Sniper - 550-842

Holley Sniper EFI Stealth 4500 - Black

Supports Up To 1500 HP - 3.5 in. LCD Touchscreen - 8 x 100 lb./hr. Injectors

Make your classic drive like a modern fuel injected vehicle, including better cold starts, smooth drivability, and improved fuel economy. Sniper Stealth 4500 was designed to be installed at home in your garage with a few tools and the support of Holley's comprehensive installation manuals and online videos. The high resolution 3.5” LCD touchscreen user-friendly setup wizard has you answer a few simple questions about your engine and the system will begin self-tuning with no laptop or tuning experience required. If you're looking for a high-performance fuel injection system that delivers power, efficiency, and ease of use, look no further than the 4500 EFI system. Take full control and make the conversion to EFI with ease with many additional accessories such as HyperSpark, air cleaners, digital dashes, and more.

• Supports up to 1500 HP naturally aspirated or 1250 HP forced induction
• 1440 CFM for large cubic inch engines with 2.125” throttle plates
• Dominator style 4 bolt air cleaner flange
• Compatible with blow through or draw through forced induction applications
• (4) wiring connections required for throttle body installation (Battery+, battery-, switched ignition, and RPM)
• Built in 2.5 MAP sensor for improved performance
• OEM designed Throttle Position Sensor and Idle Air Control module for dependable reliability
• -8AN fuel inlets for greater fuel delivery
• Bosch LSU 4.9 Wideband O2 Sensor provides real time fuel map learning, with a no welding stainless steel O2 flange and T-bolt clamps
• ECU mounted to throttle body removing extra mounting
• Self-tuning ECU with intuitive setup calibration wizard creating a base tune
• (6) programmable ground outputs and (5) programmable ground inputs used to control external relays, switches, and other devices
• (3) programmable 0-5V sensor inputs for oil and fuel pressures or monitor nitrous and other critical information
• Customizable secondary output for fuel pump activated by throttle position, RPM, or boost signal
• Programmable boost control available, software includes Boost vs. RPM, Boost vs. Time Curve, set Target Launch Boost Control Pressure, and Target Air/Fuel Rations in relation to boost control levels
• Single stage pulse width modulated progressive or nonprogressive nitrous controller that’s capable of controlling nitrous and fuel solenoids for wet or dry nitrous setup
• Integrated timing control for assisting with heavy boost, load conditions, or idle
• Programmable launch control via two-step along with a timing retard option, triggered with trans brake input
• 3.5” LCD touchscreen handheld for real time data logging, initial setup, tuning, and gauge displays to view and monitor parameters with SD card to save key information