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Hondata K-Pro V4 01-05 Civic, 02-04 RSX

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Product Description


Acura RSX/ Honda Integra

2002-2004 RSX (Type S) (PRB ECU)
2002-2004 RSX (Base 5 speed) (PND ECU)
2001-2006 Japanese DC5 Integra Type R (PRC ECU)

Honda Civic

2001-2005 Civic (DX, LX, HX & EX Manual transmission only D17 engine )
2002-2005 Civic Si (PNF ECU)
2003-2004 Japanese Civic Type R (PRD ECU)

The KPro4 consists of a hardware modification to certain K-Series ECUs, plus Windows software which allows you to re-program the ECU and datalog sensors.

Watch the introductory video

KPro4 Enhancements

Faster and more powerful

The KPro4 uses a faster processor with more capability than the KPro-III.  This allows the KPro4 to perform more tasks without slowing down the ECU, like live tuning, output to a dash, flex fuel and advanced protection.  Calibration uploads and datalogging from a laptop are also faster.

Enhanced on board datalogging

The KPro4 has double the datalogging memory (64 MBit) of the KPro-III and can datalog at double the rate (100 Hz), giving an on board recording time of 10 - 220 minutes.

Faster upload & datalogging

The upload time is 30% faster than the KPro-III, with a typical initial upload time of 7 seconds. Subsequent uploads are also faster, and live tuning can be used for instantaneous updates.
Laptop datalogging is also 30% faster than the KPro-III.

Live tuning & autotune

Main tables can be updated in real time, without affecting the operation of the engine.  This allows dyno tuning without pausing to upload.
Autotune uses live tuning and a laptop to tune fuel tables as you drive.


The KPro4 includes Bluetooth for laptop programming/datalogging with a USB cable, and mobile datalogging.

Ethanol sensor input

An ethanol sensor can be directly connected to the KPro4, allowing flex fuel operation, with adjustments to fuel & ignition tables performed automatically based on fuel ethanol content.

Speed sensor input

A speed sensor input can be directly connected to the KPro4 and sent to the ECU.  This is configurable to any pulse based sensor and eliminates the need for a stock speed sensor.

Dash & datalogging outputs

The KPro4 has serial output (both TTL & RS232) and CAN output so that a dash can be driven from the KPro. The AiM MXL, Racepak & generic CAN outputs are supported.

Advanced Protection

Advanced protection options use the KPro4 analog inputs and engine information to intelligently shut down the engine when the conditions might be dangerous to the engine.

Better wideband support

The KPro4 can process a wideband lambda input (either analog or digital) and allow the ECU to run in closed loop from an aftermarket wideband without requiring the stock o2 sensor.

Full list of features

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