Hondata ECU Reflash - Civic Si 2006-2011 is a Hondata engine management product designed for compatible Honda and Acura applications.

Reflash your 2006-2011 Civic Si engine computer - this reflash is for the US and Mexican 2006-2011 Civic Si with K20Z3 engine. Fuel, ignition and cam timing optimized. VTEC lowered from 5800 rpm to 4500 rpm. VTEC window added. Cam angle optimized. Rev limiter increased to 8600 rpm California emissions legal (CARB EO D-742) This is for an ECU reflash - the ECU is not included. Hondata does not sell direct - the reflash must be purchased from a Hondata dealer. The ECU reflash form must be sent with your ECU. Important Notes This reflash will work well with a variety of aftermarket performance parts. It will work well with: An intake Cat-backs (as long as they are less restrictive than stock) A race header * A combination of intake and race header

Fitment note: Confirm the exact vehicle year, model, engine, transmission, ECU, emissions version and region before ordering. Professional installation or tuning may be required.