Holley Fuel Injection System Master Kit Stealth 4150 Flange Polished 550-870K

Holley Fuel Injection System Master Kit Stealth 4150 Flange Polished

The Holley Fuel Injection System Master Kit Stealth 4150 Flange Polished is an advanced fuel injection solution designed for performance enthusiasts and automotive professionals. Capable of supporting up to 650 horsepower with its four 100 lb/hr injectors, this kit is perfect for both naturally aspirated and forced induction applications. With its innovative ECU that offers self-learning capabilities, this system enhances idle stability and overall drivability.

Ideal for DIYers, tradies, and fleet operators looking to upgrade their vehicles, the Holley Sniper Stealth 4150 also features convenient installation options, ensuring a seamless fit into various setups. The polished finish adds a touch of aesthetic appeal while maintaining high performance.

Key features

• Supports up to 650 horsepower with four 100 lb/hr injectors.
• Throttle body mounted ECU for a clean, compact installation.
• Self-tuning ECU eliminates the need for a laptop; simple calibration wizard included.
• Integrated ignition timing control for improved performance.
• High-resolution full-colour touchscreen for easy setup and tuning.
• All wiring exits below the rear fuel injector cover for a stealthy look.
• Compatible with various GM and Ford transmissions for added versatility.

Technical details

• Flange type: 4150.
• Maximum horsepower: 650 hp naturally aspirated, 600 hp forced induction.
• Included fuel pump and line for complete installation.
• Requires external fuel pressure regulator set to 58.5 PSI.
• Includes Genuine Bosch LSU 4.9 Wideband Oxygen Sensor for real-time tuning.
• Available finishes: Polished, Black, and Gold (coming soon).

Applications / fitment

This fuel injection system is typically used in high-performance street vehicles, racing applications, and custom builds where enhanced fuel delivery and engine management are essential.

• Perfect for passenger vehicles seeking improved performance.
• Ideal for 4x4s and off-road vehicles needing reliable fuel injection.
• Suitable for race cars requiring precise fuel management.
• Compatible with various GM TH350/400, 200R4/700R4, and Ford C4/C6 applications.

Why buy from Mick’s Gone Bush?

• Trusted Australian business focused on reliable power, auto-electrical, and service parts.
• Stock sourced from reputable distributors and brands like Holley.
• Practical support for trade, off-grid, and fleet customers.
• Clear shipping, warranty, and dedicated customer service.

Frequently asked questions

Is this kit suitable for my vehicle?

This kit is designed for high-performance applications and is compatible with various GM and Ford transmission setups. Please check your vehicle specifications for compatibility.

Do I need a laptop for tuning?

No, the Holley Sniper Stealth 4150 features a self-tuning ECU with a simple calibration wizard that allows you to set up and tune without a laptop.

What type of fuel pressure regulator do I need?

You will need an external fuel pressure regulator set to a base pressure of 58.5 PSI for optimal performance.

Can I install this myself?

Yes, the installation is designed to be straightforward, with bolt-on components and minimal wiring connections required.

What finishes are available for this kit?

The kit is available in polished, black, and gold finishes, allowing you to choose the best aesthetic for your vehicle.