The Holley Sniper 2 EFI Return-Style Drop-In Module kit brings self-tuning fuel injection to common four-barrel, 4150-flange carbureted engines. This polished kit pairs the Sniper 2 throttle body with the Bluetooth tuning interface, the optional Power Distribution Module (PDM), and a universal return-style drop-in fuel module.
Key Features:
- Includes the Power Distribution Module (PDM), which isolates core EFI and ignition wiring into a single positive-lock connector block for simplified installation
- Bluetooth module turns an iOS or Android smartphone into a tuning and monitoring interface, with a base map to get started and no laptop required
- Redesigned throttle shaft and plate geometry for a smoother, more linear throttle feel
- Next-generation ECU with improved RF noise and interference resistance for reliable operation on older vehicle wiring
- Includes a genuine Bosch LSU 4.9 wideband oxygen sensor for real-time fuel map learning
- Onboard contactless magnetic TPS sensor for accurate, drift-free throttle position readings
- Cast-in fuel crossover from the primary to secondary fuel rail
- Mil-spec style M8 positive-lock connectors for CAN1 and CAN2 provide a robust wiring connection
- "Hidden Harness" wiring exits from the rear of the throttle body for a clean installation
- Only four wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
- Integrated transmission kickdown provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications
- Included clamp-on oxygen sensor kit with stainless T-bolt clamps and a weldable O2 sensor flange for a leak-free install
- Each throttle body is individually serialized for streamlined customer service and warranty support
Specifications:
- Flange Style: 4150
- CFM: 800
- Fuel Pressure: 58.5 PSI
- Fuel Pump Flow Rating: 340 LPH
- Fuel System: Universal drop-in module (return style)
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet/Outlet Size: 9/16-18 Female O-Ring (AN 6)
- MAP Sensor: 2 Bar
- Max Horsepower Rating: 650 naturally aspirated / 575 boosted
- Finish: Polished
- User Interface: Bluetooth Module
- Power Distribution Module: Yes
- Transmission Compatibility: All
- Part Number: 550-510-BPR
Nitrous control is not supported in Sniper 2 EFI software.
FAQ
What engine and carburetor flange does this kit fit?
It's designed for common four-barrel, 4150-flange carbureted engines and supports up to 650 hp naturally aspirated or 575 hp under boost with the included four 100 lb/hr injectors.
Does this kit include the Power Distribution Module?
Yes, the PDM is included, simplifying wiring by isolating the core EFI and ignition connections into one location.
What fuel delivery style does this kit use?
It uses a universal drop-in fuel module rated at 340 LPH, designed for return-style fuel systems.
Do I need a laptop to tune it?
No. Connect an iOS or Android smartphone via Bluetooth and run the calibration wizard - no laptop required.
Is nitrous control supported?
No, nitrous control is not supported in Sniper 2 EFI software.