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Hondata 05-06 RSX Type S ECU Reflash

Hondata 05-06 RSX Type S ECU Reflash-A1
Hondata 05-06 RSX Type S ECU Reflash-A2
Hondata 05-06 RSX Type S ECU Reflash-A3
Images may be for reference only

Hondata 05-06 RSX Type S ECU Reflash

★★★★★ ★★★★★ 27 Reviews
$290.00 & Free Shipping

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It pays to shop with K Series Parts and our reward points program! For every $1.00 you spend you earn reward points.

They are easy to earn, just log in to your account when you check out. If you don't have one it is free and easy to setup.

They are easy to use during check out. Click on the "Have Reward Points?" on the shipping and payment selection page.

Reward Point Program Details

You earn 2 points for every $1.00 that you spend.

100 points equal a $1.00 discount.

Maximum discount per order is 5% of the order total.

There is no minimum order total to redeem points.

Points do not apply to shipping or sales tax.

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The point value per dollar, points earned per purchase, and order minimum are subject to change.

Earn 580 reward points. Learn More

Because of the ongoing situation with COVID-19 Hondata is taking at least 2-3 weeks to process ECU's.

Monday-Friday: 9am-4pm MST


The K20Z1 program advances the ignition, alters the cam timing and optimizes the fuel for better driving and advanced performance

**This reflash is not suitable with stock air box, race header, anything other than stock cams, force induction or nitrous.


  • VTEC window from 4900 to 5800 rpm
  • 8600 rpm Rev limit, increased from 8300 rpm
  • Maximum torque gain 12 ft/lbs torque at 6000 rpm
  • Maximum power gain 20 hp at 8000 rpm
  • Peak torque increases by 6 ft-lbs
  • Peak power increases by 8 hp
  • Very wide flat smooth torque curve. 90% of peak torque available from 2200-8000 rpm.
  • Fully dealer compatible - works with all Honda scan tools and equipment
  • This program works very well with cold air intakes and cat-back exhausts. 
  • If you have a race header then you need to use K-pro.
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.

Not legal for sale or use in California on any pollution controlled motor vehicles. See for state by state emissions requirements.

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


Brand: Hondata
Part Number: K20Z1-05
CARB Approved: No

Vehicle Fitment

Acura RSX
2005 Acura RSX Type-S 2006 Acura RSX Type-S

27 Reviews ★★★★★ ★★★★★

★★★★★ ★★★★★
4.85/5.00 Stars out of 27 Reviews
Write a Review
5 Most Recent Read All 27 Reviews
Great product!
Alex | September 18th, 2019
I installed this on my stock 2005 Rsx with just an Injen SRI. Great gains throughout the entire rpm and vehicle feels a lot smoother. It no longer lags in the lower rpms, and power loss with the ac on isnt as noticible. If you plan on just simple bolt ons I highly recommend this. I shipped my ecu, transponder, and key out Wednesay afternoon, and recieved it mid day Friday.
Noticeable difference
Steven Snow | July 14th, 2019
It's hard to believe that I'm the first post on this item in over seven years. Let me first say that this reflash has definitely made the car more responsive. It definitely woke it up. I noticed a positive difference the moment I drove it for the first time after reinstalling the ECU. I never abuse my car, but let me say that if I start at a stand still and take off it doesn't bog at all anymore. The car already sounded great with my Injen CAI and my Greddy catback exhaust. It's even more throaty now with a little aggressive throttle. Actually now that I think of it, I'm not hearing the drone in the car anymore. This reflash definitely gives good power through all stages of the powerband. VTECH kicks in sooner and doesn't seem to put me back in my seat as much as it once did, but once again the power comes on sooner and stays on. I'm still getting used to the new driving behaviors with this upgrade. I don't have any negatives to post at this time. Perhaps I'll come back in a week or two and talk about any other pros or cons. I think this was a well worth purchase. I'm definitely not sorry.
All in all, okay
Kazumi Nomura | June 30th, 2012
This product is okay. It gives moderate gains. Engine sounds a little different, sounds a little deeper. It does make your car and acceleration smoother. I like the product, it's a nice gain, improvement. You really have to look for the difference, it's not easily apparant, noticable. Hopefully should be nice with some other improvements I plan to do.
Reflash fun
Dave | April 22nd, 2012
2006 Type-S. Injen Ram air, Borla exhaust, and now the relash. Holy smokes. What a difference. Must have if you have no plans to turbo or supercharge. No need for me with these mods.
Dee Shyytt
Bthet | April 17th, 2012
I have an 06 with i/h/e and i know raceheaders are not recommended but ohhh welll :). Big difference in everyday driving which makes it more enjoyable and power gains are noticeable. Good upgrade for the price. Shipped it out monday afternoon got it back wednesday. Cant complain.
Read All 27 Reviews