Featuring (8) 100 lb/hr fuel injectors, the Sniper Stealth 4500 is built for aggressive builds making 800-1500 HP naturally aspirated or up to 1250 HP forced induction. Flowing 1440 CFM through a Dominator-style four bolt air cleaner flange, it includes a built-in 2.5 BAR MAP sensor, programmable two-step launch control, and a timing retard option triggered by the trans-brake input.
Key Features:
- Bosch LSU 4.9 wideband O2 sensor with no-weld stainless steel flange and T-bolt clamps for real-time fuel map learning
- 1440 CFM for large cubic inch engines with 2.125" throttle plates
- Single-stage pulse width modulated progressive or nonprogressive nitrous controller for wet or dry nitrous setups
- Integrated timing control assists with heavy boost, load conditions, or idle
- Programmable launch control via two-step with a timing retard option triggered by trans-brake input
- ECU mounted directly to the throttle body, removing extra mounting
- Self-tuning ECU with an intuitive setup calibration wizard that creates a base tune
- 3.5" LCD touchscreen handheld for real-time data logging, setup, tuning, and gauge displays, with SD card storage
- (6) programmable ground outputs and (5) programmable ground inputs for relays, switches, and other devices
- -8AN fuel inlets for greater fuel delivery
- Dominator-style 4-bolt air cleaner flange
- Compatible with blow-through or draw-through forced induction applications
- (3) programmable 0-5V sensor inputs for oil/fuel pressure or nitrous monitoring
- Customizable secondary output for fuel pump activation by throttle position, RPM, or boost signal
- Built-in 2.5 BAR MAP sensor for improved performance
- OEM-designed Throttle Position Sensor and Idle Air Control module for dependable reliability
Specifications:
- Flange Style: 4500
- CFM: 1440
- Throttle Bore: 2.125 in.
- Fuel Pressure: 58.5 PSI
- Injector Size: (8) 100 lb/hr @ 58.5 PSI
- Inlet/Outlet Size: 8AN
- MAP Sensor: 2.5 BAR
- Max Horsepower Rating: 1500 HP naturally aspirated, 1250 HP forced induction
- User Interface: 3.5 in. Handheld
- Finish: Black
- Part Number: 550-842
Not intended for engines producing 800 HP or less. Racing fuels may shorten O2 wideband sensor service life. Holley P/N 12-848 (or 12-848KIT with gauge) is required for the external fuel pressure regulator. For marine installations, a flame arrestor is legally required (Holley P/N 720-1 or 720-11 with 720-31 or 720-33 vent tube).
FAQ
What horsepower range is the Stealth 4500 designed for?
It's built for 800-1500 HP naturally aspirated or up to 1250 HP forced induction applications; it is not intended for engines producing 800 HP or less.
Does this system include launch control?
Yes, programmable two-step launch control with a timing retard option triggered by the trans-brake input is built in.
Can this throttle body control nitrous?
Yes, it includes a single-stage pulse width modulated nitrous controller capable of controlling nitrous and fuel solenoids for wet or dry setups.
Is an external fuel pressure regulator required?
Yes, Holley P/N 12-848 or 12-848KIT (with gauge) is required and set to a base pressure of 58.5 PSI.
What air cleaner flange does this use?
A Dominator-style 4-bolt air cleaner flange.
Do I need a laptop to tune this system?
No, the self-tuning ECU uses an intuitive setup calibration wizard through the included 3.5" LCD touchscreen handheld.
