The Sniper 2 EFI return style drop-in module swaps a 4150-flange carburetor for a complete self-tuning fuel injection system built around a return-style fuel delivery setup. A guided calibration wizard builds a base tune from a few simple questions about the engine, so the system starts self-tuning without a laptop or prior tuning experience.
Key Features:
- Only four wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
- All-new throttle body design with redesigned throttle shaft and plate geometry for smoother throttle feel
- Onboard contactless magnetic TPS sensor for accurate throttle position readings
- Included genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning
- Clamp-on oxygen sensor kit with stainless T-bolt clamps and a weldable O2 flange for a leak-free install
- "Hidden Harness" wiring exits from the rear of the throttle body for a clean appearance
- Next-generation mil-spec M8 positive lock connectors for CAN1/CAN2
- Main harness includes plug-and-play HyperSpark distributor support for integrated timing control
- Integrated transmission kickdown provisions for GM TH350/400, 200-4R/700R4, and Ford C4/C6
- Cast-in fuel crossover from the primary to secondary fuel rail
- Next-generation ECU with improved RF noise and interference resistance
- Compatible with the full Sniper EFI ecosystem — HyperSpark ignition, fuel systems, and multiple display options
- Sniper 2 throttle bodies are individually serialized for improved warranty and service tracking
- Calibration wizard builds a base map and begins self-tuning from a few engine questions — no laptop required
Specifications:
- Product Type: Sniper EFI Fuel Injection Conversion Kit
- Flange Style: 4150
- Max Horsepower Rating: 650 hp naturally aspirated
- Injector Size: 100 lb/hr @ 58.5 PSI
- Fuel Pressure: 58.5 PSI
- Fuel System: Universal Drop-In Module, Return Style
- Fuel Pump Flow Rating: 340 LPH
- MAP Sensor: 2 Bar
- Inlet/Outlet Size: 9/16-18 Female O-Ring (AN 6)
- Power Distribution Module: Not included
- User Interface: 3.5 in. Handheld
- Transmission Compatibility: All
- Finish: Black
- Height: 3.28 in.
- Warranty: Two Year Standard, Extended via Product Registration
- Part Number: 550-511-3XR
Nitrous control is not supported in Sniper 2 EFI software. This drop-in module is built for return-style fuel delivery setups; a returnless in-tank version is available separately.
FAQ
What's different about the return style module?
It's built around a 340 LPH drop-in fuel pump module set up for a return-style fuel delivery system, rather than a returnless in-tank setup.
How many wiring connections does it require?
Just four: Battery+, Battery-, Switched Ignition, and RPM.
How much horsepower can it support?
Up to 650 hp naturally aspirated, or 575 hp on boost, using the included four 100 lb/hr injectors.
Do I need a laptop to tune it?
No. The onboard calibration wizard asks a few basic questions about the engine and begins self-tuning automatically.
Does this kit include the Power Distribution Module (PDM)?
No, this is the non-PDM version with a 3.5 in. handheld display. PDM-equipped kits are available separately.
