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Hondata 06-11 Civic Si ECU Reflash

Hondata 06-11 Civic Si ECU Reflash-A1
Hondata 06-11 Civic Si ECU Reflash-A2
Hondata 06-11 Civic Si ECU Reflash-A3
Images may be for reference only

Hondata 06-11 Civic Si ECU Reflash

★★★★★ ★★★★★ 2 Reviews
$290.00 & Free Shipping

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Monday-Friday: 9am-4pm MST


The 2006-2011 Honda Civic Si Hondata reflash advances the ignition, alters the cam timing and optimizes the fuel adding up to 25hp and 29ft/lbs of torque across the rev range.


  • 4500 rpm VTEC point
  • Rev limiter raised to 8600 rpm.
  • 15-25 Hp gain midrange
  • 15-29 ft lb torque gain midrange
  • US and Canadian 2006-2011 Civic Si with K20Z3 engine ECU part number 37820-RRB-A04 to 37820-RRB-A14
  • The reflash lowers the VTEC point to 4500rpm, advances the cam angle and raises the rev limit to 8500 rpm.
  • Works With An intake -Cat-backs (as long as they are less restrictive than stock) -A race header* -A combination of intake and race header
  • California emissions legal (CARB EO D-742)

After you order you will receive two emails; one with full instructions on where and how to send your ECU to Hondata and another with the form that you need to sign and include with your ECU.

You are required to send your ECU to Hondata for this service. This product is final sale.

WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects.


Brand: Hondata
Part Number: K20Z3-06/09Si
CARB Approved: Yes

Vehicle Fitment

Honda Civic
2006 Honda Civic Si Coupe 2007 Honda Civic Si Coupe 2008 Honda Civic Si Coupe 2009 Honda Civic Si Coupe 2010 Honda Civic Si Coupe 2011 Honda Civic Si Coupe
2007 Honda Civic Si Sedan 2008 Honda Civic Si Sedan 2009 Honda Civic Si Sedan 2010 Honda Civic Si Sedan 2011 Honda Civic Si Sedan

2 Reviews ★★★★★ ★★★★★

★★★★★ ★★★★★
5.00/5.00 Stars out of 2 Reviews
Write a Review
Avel | March 20th, 2020
VTEC Hits Like They Said It Would. 4600rpm
Hondata Reflash
Kent Donahue | June 6th, 2008
I received quick responces to my questions from CLUBRSX. Getting the Hondata Reflash for my 07 Civic SI through CLUBRSX was an easy process and the Reflash was worth every penny.