Hondata Kpro4

Hondata Kpro4

Hondata Kpro4

Pre-install into a used ECU?
Regular price $ 795.00

Note that if you choose to have KPower supply your ECU, you may experience an extended lead time to due to a shortage in used ECUs. For quickest turnaround, please source your own ECU.

Per Hondata, please allow 4-6 weeks for KPro board installation!

If you are unfamiliar with Hondata, please read this information carefully, it will answer almost all frequently asked questions for new users.

Unlike some ECU options, Kpro is installed directly into an OEM ECU.  In order to function with our swap package and wiring harness, you’ll need an ECU from one of the following vehicles, regardless of which K series engine you are using:

2002-2004 Acura RSX base model or Type S (manual or auto)

2002-2005 Honda Civic Si

2002-2004 Honda CR-V (manual or auto, 2WD or 4WD)

Note that the more expensive RSX Type S (6 speed) ECU is not needed for our swaps, since a K series transmission is not used.  If you select the option to have your Kpro pre-installed in an ECU, you will receive one of the ECUs from the list above.

As soon as Kpro is installed, we recommend immediately taking the vehicle to a qualified K series tuner for a full dyno tune.  If you need a recommendation for a basemap to start the car, please email us at


Updated Shipping Instructions:

For all customer-supplied ECUs: 

1) Please fill out THIS FORM and ship your ECU directly to Hondata (address on the form). Select 2002-2004 RSX-S ECU regardless of the type of approved ECU you're using. Please enter KPower Industries under Dealer Name. You are responsible for paying to ship your ECU. 

2) You will receive a PO from KPower to include in the box. Please wait to ship your ECU until you have the PO to print and include.

For all KPower-supplied ECUs:

KPower will handle shipping of your ECU to Hondata and it will ship directly to your address once it's ready. 


Kpro4 Main Features (from

  • Fits inside the ECU

  • Designed and assembled in USA

  • USB connection for speed and compatibility

  • KManager Windows based software for parameter & table editing, calibration uploading and datalogging.

  • Many built in calibrations for common engine combinations

  • Built in datalogging to a laptop

  • On board datalogging memory (8 MB memory, 10-215 minutes datalogging)

  • Adjustment for different sized injectors, with overall fuel trim.

  • Configurable for any MAP sensor (to 5 Bar and above)

  • TPS based table lookup for ITBs

  • Engine protection from lean air fuel ratios, over boost and low oil/fuel pressure.

  • Expanded fuel and ignition tables, both in rpm and load, to 60 lbs boost and 11,000 rpm (these are not the upper limits)

  • Launch control with anti-lag

  • Three multi purpose outputs for nitrous control or similar.

  • Supports lambda tracing from the stock wideband o2 or aftermarket wideband.

  • PWM output for boost control

  • Bluetooth support and Hondata Mobile app.

  • Ethanol sensor input for flex fuel capability.

  • Alternate speed sensor input.

  • Dash output serial & CAN streams.

  • Live tuning and auto tune.


KManager editing software features:

  • High and low speed 16 x 20 ignition and fuel tables at multiple cam angles for correct VTEC and VTC tuning.

  • Injector size fuel trim

  • Fuel trim for starting, throttle tip in and individual cylinder trim

  • Rev limiter with fuel cut

  • Launch control with anti-lag

  • Adjustable VTEC window with load and throttle control

  • Adjustable idle speed

  • MAP sensor type and calibration

  • Adjustable boost cut with hot and cold settings

  • Closed loop control

  • Air temperature compensation

  • Fuel and ignition correction based on gear

  • Closed loop

  • Three general purpose outputs for nitrous control, quad boost control or similar

  • On board datalogging trigger conditions

Application Notes

  • Base maps are included only for K20A2, K20A3 (RSX Base), K20A3 (Civic SI) and K20A engines.

  • The 2002- CRV ECU (5 speed) (PPA -A0# ECU) can be used.

  • Support for the manual K20A3 engine and the secondary intake runner as used in the base model RSX and CRV.

  • The Japanese PRD and PRC ECU do not support a fuel tank pressure sensor.

  • PNF, PPA and PND ECUs for 5 speed transmissions will not operate the reverse lock solenoid on 6 speed transmissions.

  • The K-Pro ECU will not work on Automatic vehicles.  Automatic ECUs cannot be converted to manual.

  • To use the K-Pro on a 2005-2006 RSX, an adapter harness is required, an 02-04 specially modified ECU must be modified for used and the primary oxygen sensor from an 03-04 must be used.

General Notes

  • From previous ECU's Honda has changed from 2 dimensional tables (engine speed and engine load) to 3 dimensional tables (engine speed, engine load and cam angle). The K-Pro ECU retains these 3 dimensional tables to ensure the engine is running at optimum efficiency and power for every cam angle.

  • The stock JDM and US O2 sensor is wide band and can read from 11.5:1 to 30:1 A/F ratios.

  • Most OBDII features may be disabled for race vehicles.

  • Error codes and the OBDII readiness status may be datalogged.

  • Base tables are supplied for the RSX Type S, RSX Base, Civic SI and Integra Type R engines. These tables have been dyno tuned.

  • No external programmer or other equipment is necessary. Just plug the ECU into a laptop via a USB cable.

  • Tables may be map-traced in real time.

  • Main tables are real-time updateable, changes to other tables and settings can be uploaded typically in less than a second.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Hondata Kpro4
from $ 795.00
74mm Cable Throttle Body - Version 2
$ 229.00
Idle Air Control Valve Block Off Plate
$ 18.00