EFI Source

01/08/2026

EFI Source supplies Goldbox, MegaSquirt, MicroSquirt, LS, Hemi, Harness, and other programmable EFI systems and products o the performance minded automotive community.

01/01/2026

11/10/2025

EFI Source supplies Goldbox, MegaSquirt, MicroSquirt, LS, Hemi, Harness, and other programmable EFI systems and products o the performance minded automotive community.

09/19/2025

Uncle Jeff brings home the bacon In the Gambler Race on day 1 of the NHRA Division 1 bracket finals at Numidia dragway.

09/05/2025

https://www.instagram.com/p/DOOu294Dh2Q/?igsh=MWFxcnJvZTJ4eHN3bA==

08/20/2025

🚨 Unlock the Full Potential of Your Foxbody!

Introducing the MS3 Gold Lite by EFI Source – the ultimate plug-and-play ECU solution for your 5.0 Mustang. Whether you’re daily driving, cruising the boardwalk, or hitting the track, this kit delivers modern EFI control with ease.

✨ Kit Includes:
✅ MS3 Gold Lite ECU – configured for EEC-IV with TFI distributor
✅ Gold Lite to EEC-IV adapter harness
✅ 3 Bar MAP sensor with pigtail (replaces the factory BAP sensor)
✅ Preloaded base tune for a stock 5.0 Mustang

⚡ Simple installation. Reliable performance. Endless tuning possibilities.

👉 Upgrade your Mustang today with EFI Source’s MS3 Gold Lite – where old-school muscle meets modern technology.

EFI Source supplies Goldbox, MegaSquirt, MicroSquirt, LS, Hemi, Harness, and other programmable EFI systems and products o the performance minded automotive community.

08/09/2025