Beginner — under 30 min
Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Holley |
| Part Number | H00E 300-251 |
| Weight | 0.05 lb |
Videos
Terminator X EFI for Ford Part 1: Sensors And Relay Wiring
Holley 6 In 1 PNP (Alt/Flex/Dial/Boost/Dome/Fill/Vent) Ultimate Combos
Holley EFI Big Wire Coil-Near-Plug Smart Coil Kit
Holley Terminator X Max install for newbies! Easier than you think!
Hcr Innovation Main Engine Harness for Holley Efi
How to Set Your IAC & TPS for a Perfect Idle | Holley Sniper EFI, Terminator X, & Holley EFI
Terminator X EFI for LS Engines
Holley Terminator X - SBF FORD Kit 550-937 UNBOX + Additional Sensors Needed
Foxbody Mustang Holley Terminator X Install
The OG is back! Fox Body Mustang Holley Terminator X Kit - Overview & Full Explanation (550-937F)
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy