Holley Sniper EFI - Holley Sniper Stealth 4150 - Classic Gold 550-872
Type: Sniper Stealth EFI 4150
Holley's Sniper Stealth 4150 Master Kit gives you carburetor styling but functions just like the Sniper! A 4150 stealth is a great way to upgrade your ride to fuel injection in a cost-efficient way with just 4 simple connections required. Take your build to the next level and take advantage of improved engine performance, better MPG's and easier starting. This kit supports up to 650hp naturally aspirated and 600hp boosted with Four 100 Lb/Hr injectors!
You don't have to be a computer wiz or tuning professional to run a sniper kit on your build. Simplicity is what we strive for! Our calibration wizard allows you to just answer a few questions about your engine and the system will begin self-tuning with no laptop required. Use the high resolution 3.5" full color touchscreen for tuning and gauge displays. The stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications.
Once you made your conversion to EFI, don't stop there! Sniper is an Ecosystem! This kit pair's seamlessly together with Holley's Sniper Hyperspark Ignition, Fuel System's, Air Cleaners, Throttle Body & Digital Dash to unlock the full potential of your build.
Features:
- Bolt on 4150 flange carburetor replacement fit’s a wide range of factory intake manifolds
- Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
- Simple calibration wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
- Only 4 wiring connections required! (Battery +, battery - , switched ignition & RPM)
- High resolution full color touchscreen for initial setup, tuning, and gauge displays
- Throttle body mounted ECU – no extra boxes to mount
- Supports up to 650HP with four 100lb/hr injectors or 1250HP with eight 100lb/hr injectors
- All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
- Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
- Requires use of external fuel pressure regulator, Holley PN# 12-886 or equivalent, set to a base pressure of 58.5 PSI
- Integrated ignition timing control improves idle stability, drive-ability, and wide open throttle response
- The included Genuine Bosch LSU 4.9 wideband oxygen sensor provides realtime fuel map learn!
- OEM style TPS/IAC and fuel pressure regulator, for years of dependable service
- Also available in Black, PN# 550-871 and Shiny, PN# 550-870 finishes
Specs:
- Accelerometer Support: No
- Boost Control: No
- Brand: Holley Sniper EFI
- CAN-BUS Support: No
- Category: Air and Fuel Delivery
- CFM: 870
- Coil Per Cylinder Ignition Support: No
- Datalogging Support: Yes
- Distributor Included: No
- Dry Nitrous Control: Yes
- e85 Support: No
- EGT Support: No
- Emission Code: 3
- Finish: Classic Gold
- Flange Style: 4150
- Forced Induction Support: Yes
- Fuel Filter Included: No
- Fuel Hose Included: No
- Fuel Injectors Included: Yes
- Fuel Pressure: 58.5 PSI
- Fuel Pressure Regulator Included: No
- Fuel Pump Included: No
- Grade Type: Performance
- Height: 3.28"
- Ignition Timing Control: Yes
- Individual Cylinder Fuel Corrections: No
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet / Outlet Size: 3/4-16 Female O-Ring (AN 8)
- Intake Manifold Included: No
- Knock Retard Support: No
- MAP Sensor: 2 Bar
- Max Horsepower Rating: 650 Naturally Aspirated
- Model: 4150 EFI Conversion Throttle Body
- Multi-Stage Nitrous Control: Yes
- Part Type: Fuel Injection Conversion Kit
- Product Type: Sniper Stealth EFI 4150
- Progressive Nitrous Control: Yes
- Self-Tuning: Yes
- Sub Category: Service Kits
- Throttle Position Sensor Included: Yes
- Traction Control Support: No
- Transmission: 700R4/200R4, Ford C4/C6, TH350
- User-Tuneable: Yes
- Wet Nitrous Control: Yes
Tech Resources:
Part # 534-247 is required to complete installation.
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Important Notices
- Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
