Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Features, Description, Q&A, Specs & Installation
Engine Management Solution. The Holley EFI Terminator X is designed specifically for GM LS1 and LS6 engines, providing comprehensive control over fuel and ignition systems. This standalone ECU offers real-time self-learning fuel strategies, advanced tuning capabilities, and support for various performance enhancements such as nitrous and boost control, making it ideal for both street and race applications.
Construction and Appearance. Constructed with a durable black textured finish, the compact ECU is built for flexibility and robust use. It includes onboard Bosch LSU 4.9 wideband sensor integration and diagnostic LED indicators for ease of troubleshooting, all housed in a size that facilitates versatile mounting options.
Installation. The Terminator X ECU integrates with included LS1/LS6 harnesses and components for a plug-and-play experience. Installation is straightforward and suitable for users with basic to moderate technical skills.
Holley EFI 550-909
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation Info
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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