Magneti Marelli EFI Relay

Part Number E2211

Replacement relay designed specifically for motorcycles equipped with the Magneti Marelli EFI system that are being upgraded with a ThunderMax ECM. This modified closed-circuit relay ensures proper system operation and compatibility between the Marelli wiring harness and the ThunderMax control module. 

Key Features:

Modified “closed” relay configuration tailored for Marelli EFI systems with ThunderMax ECM. 

Plug-and-play form factor designed to replace the factory “ECM Power Relay” in Marelli-equipped bikes. 

Ideal for 1999-2001 Marelli EFI Harley-Davidson® models (and other compatible Marelli harness bikes)

Compatibility & Install Notes:

Use when replacing the ECM on a Marelli-controlled EFI motorcycle with a ThunderMax ECM to guarantee proper relay operation.

During installation: disconnect battery positive first, remove the existing ECM power relay, then install the E2211 relay in the stock relay location. 

Confirm harness compatibility and ensure the relay is inserted into the correct socket (typically under the seat or near the main harness junction) before reconnecting power.