Holley EFI 558-416 LS Main Harness to LS3-Style MAP Sensor Adapter

The Holley EFI 558-416 is a MAP sensor adapter harness designed to bridge the connection between LS1/LS2 main wiring harnesses and LS3-style MAP sensors. This adapter allows you to use the higher-performance LS3 MAP sensor configuration with earlier LS engine management systems, eliminating wiring compatibility issues when upgrading sensors or retrofitting engine management components.

Key Features:

• Connects LS1/LS2 main harnesses to LS3-style MAP sensors
• Enables MAP sensor upgrades without harness modifications
• Factory-quality connectors for reliable performance
• Simplifies engine management system retrofits and upgrades
• Compatible with Holley EFI systems and OEM applications

This adapter is essential for builders and tuners working with mixed-generation LS components, providing a plug-and-play solution for MAP sensor compatibility. Perfect for engine swaps, EFI conversions, and performance upgrades where sensor configurations don't match the original harness.