Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Air and Fuel› Fuel Injection Systems and Components - Electronic
Holley
HOLLEY MPFI LS1 W/ EV6 550-909-1
SKU: H00E 550-909-1
Advanced — 4+ hours
Overview
Show original supplier description
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
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 550-909-1 |
Videos
How To: Install Terminator X EFI on any LS Engine
Ditch the Carb and Go EFI with Holley Terminator X Stealth 4500 and 4150
Holley Terminator X Max install for newbies! Easier than you think!
Holley terminator X max step by step install 1996-1998 chevy obs
The Best Budget LS Swap ECU 2019 (Holley Terminator X )
New to Holley EFI? Start Here!
How To Install a Fiesta Style IAC into Foxbody Mustang Using a Holley Terminator X Computer
Holley Terminator X Install on a Foxbody Mustang
Terminator X EFI for LS Engines
How to set up a 2 STEP with your Holley Terminator X! EASY!
We’re here — turning wrenches, just like you.
Call us, follow along, or come say hi.
Buy with Confidence
Returns & Fitment
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 PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
View Full Shipping Policy