8′ Classic MegaSquirt Wiring Bundle

The MegaSquirt 8′ Wiring Bundle is designed for reliability, clean routing, and ease of installation. Built from high-temp TXL automotive-grade wire, this harness includes thoughtful improvements to reduce noise, streamline wiring, and improve functionality—making it the most refined MegaSquirt wiring solution available.

Whether you're wiring a fresh standalone EFI system or upgrading an existing install, this bundle helps you get it right the first time with clearly labeled wires, noise-resistant construction package.

Compatibility:

• MegaSquirt-3 (MS3)

• MegaSquirt-2 (MS2)

Key Features:

• 8′ of color-coded TXL automotive-grade wire rated for high heat

• Twisted and shielded ignition input cable for superior noise suppression

• Dedicated sensor ground wire for clean signal returns

This is the bundle we recommend for most MS2, and MS3 applications that wire directly to the ECU’s DB37. 

Note: This harness is not compatible with the MegaSquirt Relay Cable. Use one or the other—not both—depending on your setup.