The #1 EFI conversion system just got better. Sniper 2 EFI is a self-tuning, easy-to-install conversion for common 4-barrel (4150 flange) carburetors, built to be installed at home with limited tools and Holley's installation manuals and videos. The included Power Distribution Module simplifies wiring, and the 5 in. handheld setup wizard builds a base tune from a few simple questions about the engine — no laptop required.
Key Features:
- Optional Power Distribution Module (PDM) isolates core EFI and ignition wiring into one positive-lock connection point
- Next generation mil-spec-style M8 positive-lock connector for CAN1/CAN2 wiring
- Hidden-harness wiring exits from the rear of the throttle body for a clean appearance
- Onboard contactless magnetic TPS sensor for an accurate throttle position reading
- Next generation ECU with improved RF noise and interference resistance
- Integrated transmission kick-down provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6
- Genuine Bosch LSU 4.9 wideband oxygen sensor for real-time fuel map learning
- Clamp-on oxygen sensor kit with stainless T-bolt clamps and stainless weldable O2 flange
- Cast-in fuel crossover from the primary to secondary fuel rail
- Only 4 wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
- Main harness includes plug-and-play HyperSpark distributor support for integrated timing control
- 5 in. full-color LCD touchscreen handheld for setup, tuning, and gauge displays
- Supports up to 650 hp naturally aspirated with four 100 lb/hr injectors
- Sniper 2 throttle bodies are individually serialized for improved warranty/service tracking
Specifications:
- Product Type: Sniper EFI
- Flange Style: 4150
- Finish: Black
- CFM: 800
- Max Horsepower Rating: 650 Naturally Aspirated
- Injector Size: 100 lb/hr @ 58.5 PSI
- Fuel Pressure: 58.5 PSI
- Fuel System: Not Included
- Power Distribution Module: Yes
- Distributor Included: No
- HyperSpark Ignition Kit: No
- MAP Sensor: 2 Bar
- User Interface: 5 in. Handheld
- Transmission Compatibility: All
- Height: 3.28 in.
- Warranty: Two Year Standard, Extended Via Product Registration
- Part Number: 550-511-5PX
Nitrous control is not supported in Sniper 2 EFI software.
FAQ
Does the 550-511-5PX include a fuel system?
No. This base kit does not include a fuel system — an external fuel pump and pressure regulator set to 58.5 PSI are required.
What does the PDM do?
The Power Distribution Module isolates the core EFI and ignition wiring into one easy connection point — only battery power, ground, and a switched 12V source are needed to power the PDM and the Sniper 2 system.
How is this kit tuned?
The 5 in. handheld runs a setup wizard that asks a few questions about the engine and builds a base tune, then the system self-tunes with no laptop needed.
What's the maximum horsepower this kit supports?
Up to 650 hp naturally aspirated with four 100 lb/hr injectors.
Is nitrous control supported?
No, nitrous control is not supported in Sniper 2 EFI software.