The Sniper EFI Quadrajet converts a Rochester spread-bore carburetor to self-tuning throttle-body fuel injection without adapters or intake swaps, using four 100 lb./hr. injectors and a throttle-body-mounted ECU.

Holley 550-869 Highlights:

• Fits Rochester Quadrajet spread-bore intake manifolds.
• 715 CFM throttle body supporting up to 500 HP naturally aspirated.
• Four 100 lb./hr. fuel injectors.
• Built-in ignition timing control.
• 3.5 in. LCD touchscreen with self-tuning wizard.
• Four-wire installation with throttle-body-mounted ECU.