Dealer Discount Items

Hondata Kpro4


$ 695.00
Hondata Kpro4

Hondata Kpro has been a popular engine manage solution for K swapped vehicles for years, and we are pleased to bring this tuning software to the Miata community.

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

Unlike other Miata 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 in a Miata, 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



You are responsible for paying for and sending your ECU to Hondata. You can send your ECU as fast as you would like and shipping costs normally start at $10.00 for ground and $60.00+ for next day air. We recommend shipping it via FedEx or UPS and avoid using USPS.  You are not sending your ECU to us, but you will be sending it to Hondata directly and we will email you all of the instructions on where it needs to be sent once your order is approved.


Order Processing:

After we approve your order we will send you two emails, one email will be a Hondata form and the other email will be instructions for shipping and what items need to be included. Orders are typically approved within 24 hours, but usually more quickly. Hondata normally reflashes ECU's the same day they receive them, but we recommend allowing for a three day turnaround time before the ECU is leaves Hondata with Kpro installed.


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.

  • Turn around time is usually 2 days from the time it is received.

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.

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