The electrical topic is probably the most complicated one when it comes to swapping a K-Series engine into a Honda Civic EM2. I hear all these wiring questions all the time. Indeed, it is not as simple as installing some aftermarket engine mounts or changing the shifting cables. But with good guidance, it is possible to achieve the goal of a running engine without any error codes and malfunctions.

Besides the fact that there is not much information available on this topic, the few helpful websites or blog posts are very specific and contain only information chunks - there's no clear path which describes you what exactly has to be modified.

While we were busy with our second K20-EM2 project, we decided to write a guide which contains all the information you need. The whole job can be quite overwhelming, especially for someone who's not so familiar with car tech.

This is the reason why we invested a bunch of work and effort to come up with a clear and easy understandable step-by-step guidance which supports you throughout the whole book. A lot of photo material adds even more value.

Enough with talking. You probably can't wait to get one of these guides in your possession, right? The guide is available as an e-book so you'll get instant access!


The book explains you exactly how to modify the K-Series engine harness as well as how to wire in the primary oxygen sensor for proper operation.


We'll give you exact guidance on how to re-pin the engine harness so that the car can communicate with the K20 engine.

K20-EM2 Wiring Guide - C101 Layout


K20-EM2 Wiring Guide - C101 Repin

In order to get the primary oxygen sensor working, there are different approaches depending on the type of ECU and year of your EM2.

We'll show you how to wire in the sensor in combination with a PRA (Civic Type-R) or PRB (Acura RSX) engine control unit.


K20-EM2 Wiring Guide - Oxygen Sensor Wiring (PRB)


K20-EM2 Wiring Guide - Sensor Heater Wiring


You'll get the entire book. If you're dissatisfied with the content for any reason, you'll get 100% of your money back.

We are convinced that we provide you only with high quality and helpful material.

That's why we offer you an unbeatable


If you are unhappy with the book, just write us an email and we will refund your money, no questions asked!



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We're happy to help you.