My car is an 04 Honda Civic Sir EP3. SI in the US. These cars have the same engine as the Acura RSX type S. It is the 2.0L 16 Valve DOHC i-VTEC K-series engine. The Acura has 200 HP and redlines around 8300 RPM. The Civic has 160 HP and redlines at 7000 RPM. The Civic EP3 that is available in Japan is actually called the type R and is fast and high revving like the RSX. My question is, aside from reprogramming my Honda ECU and getting a higher performance intake manifold like the RSX, what else needs to be done to increase the HP and remove the rev limiter programing, and basically have the engine work the way it was designed before Honda detuned it?

 

It's called K-pro. Only way.

 

I think you have the K20A3 instead of the K20A2 which is what is in RSX-S's. Your engine isn't just electronically detuned, but there are a lot of mechanical differences between the A2 and A3. IIRC, North America didn't get a civic type-r.

 

Swap out your motor for the motor K20a2...