Hondata Honda Civic - 2005 - Sedan [GX] Parts Catalog
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About Hondata Hondata modifies standard Honda engine computers (ECUs), adding features and expanding the capabilities of the ECU (e.g. for forced induction). Hondata's basic idea is: "Nothing runs a Honda engine as well as a Honda ECU. End of story." Hondata systems are essentially a re-programming of your stock Honda ECU that allows your engine to obtain maximum power out of the parts you've installed on it.