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Hondata 02-04 RSX Type-S ECU Reflash

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Hondata 02-04 RSX Type-S ECU Reflash

★★★★★ ★★★★★ 37 Reviews
$290.00 & Free Shipping

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The 2002-2004 Acura RSX Type-S K20A2 program advances the ignition, alters the cam timing and optimizes the fuel for a cold air intake headers and exhaust, adding 12-20 ft lb across the rev range.


  • 15-20 ft/lb torque increase between 2500-3500 rpm.
  • 12-20 peak wheel hp from a stock RSX depending on the dyno and modifications.
  • Peak torque now at 3200 rpm on an unmodified RSX.
  • Very flat smooth torque curve. 95% of peak torque available from 2500-8000 rpm.
  • Rev limiter optionally raised to 8600 RPM.
  • VTEC point lowered to 5200 rpm for cars with intake systems.
  • Passes Californian smog testing (no measurable difference from stock).
  • Fully dealer compatible - works with all Honda scan tools and equipment.
  • 02-04 RSX Type S with K20A2 engine ECU part number: PRB A01 through PRB A08
  • This program was tuned specifically for a cold air intake, as they give the best power gains.
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.


Brand: Hondata
Part Number: K20A2
CARB Approved: No

Vehicle Fitment

Acura RSX
2002 Acura RSX Type-S 2003 Acura RSX Type-S 2004 Acura RSX Type-S

37 Reviews ★★★★★ ★★★★★

★★★★★ ★★★★★
4.86/5.00 Stars out of 37 Reviews
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5 Most Recent Read All 37 Reviews
Far more civilized a must
Chris Guinn | October 27th, 2017
Didn't realize how far from optimal the stock calibration was downshifting let off everything about the driving experience improved far easier smoother and more quiet not as hot/cold on/off all or nothing and yeah she's ready for that mustang new redlines like an illicit substance
Well worth it, and can upgrade to kpro later? SOLD!
Drew Ottman | August 22nd, 2017
Definitely helped my 2003 RSX S with CAI,RH,AND EXHAUST. VTEC at 5200 still gives a nice crossover and the throttle response is amazing. I also have a ITR ecu so I will say each have their advantages but other then VTEC they both make the car a MEAN MACHINE; maybe I'll do a dyno comparison one day.
Mario Cruz | June 13th, 2017
IT DID NOT LOWER VTEC stayed at 5800rpm. That's what I was looking forward to the most. But I still gave it a 4 star because you can feel the power gain, nothing to crazy though. But yes worth the money! BEFORE: AFTER: 04 RSX Type S 14 Honda Si
Best bang for your buck!
Dole Mohamed | December 24th, 2015
Best bang for your buck! I had the an injen cai before I got the reflash and it basically just made the car sound better. There wasn't a noticeable difference in power. Now the power band is very even and smooth. I don't have to wait till 6k rpms for power. I even spin tires in 1st if I floor it. Definitely worth the money. I also like how they let you pay the difference for Kpro if you want to do more upgrades.
Best $300 I ever spent.
Nathan K | May 13th, 2015
I have the reflash along with an aem v2 intake and 8600 limiter. I must say having the power down low makes regular street driving much easier. The car just wants to go once i put my foot down and this is WITHOUT downshifting to gain speed. For those spirited runs the car comes alive more than before stock and wants to keep going until the road runs out. It makes it feel like a much better car and feels like it should have been like this from the start. This is a must have in my opinion for anyone that cant afford kpro yet(like me) or someone that wants some extra power for a stock daily or a full bolt on rsx.. Kseriesparts customer service was extremely helpful and helped sort out whatever issues there were with my order. If you are thinking about buying the reflash definitely get it from Kseries.
Read All 37 Reviews