Holley | 4150 Sniper Stealth Master Kit

Holley – Sniper Stealth 4150 EFI Master Kit

Description

The Holley Sniper Stealth 4150 EFI Master Kit (550-871K) is a complete bolt-on carburetor replacement for 4150-flange applications, featuring a black finish. It includes 4 x 100 LB/HR fuel injectors supporting up to 650 HP naturally aspirated or 600 HP on forced induction. The ECU mounts directly on the throttle body — no additional boxes required. The system features real-time fuel map self-learning and complete ignition timing control for improved idle stability, drivability, and wide-open throttle power. Transmission kickdown provisions are included for GM TH350/400, 200R4/700R4 and Ford C4/C6. Note: Part # 34-42 is required for bolt-in installation. The master kit includes an external fuel pressure regulator preset to 58.5 PSI, 20 ft of 3/8 in. Vapor Guard fuel hose, a fuel pump, filters, and a bulkhead fitting for fuel return.

Specifications

• Brand: Holley
• Part Number: 550-871K
• Type: Master Kit — complete fuel system included
• Finish: Black
• Flow Rate: 870 CFM
• Injectors: 4 x 100 LB/HR
• Supported Power: up to 650 HP NA / 600 HP forced induction
• Flange: 4150 (bolt-on replacement)
• Fuel Pressure: 58.5 PSI (preset regulator included)
• Transmission Provisions: TH350/400, 200R4/700R4, Ford C4/C6
• Throttle body-mounted ECU (no extra boxes)
• Compatibility: universal 4150 flange (See Application Section)
• Condition: New
• Sold and shipped by GBP Performance

Note:

• Livraison GRATUITE / FREE Delivery