Also supposedly, per my Honda dyno guy that I saw 2 weeks ago, if you replace the rocker arms and cams in the motor you have, you get 90% of the benefit to going to an RSX-S motor. Yeah, you can install exhaust rockers on the intake side, and then whatever the "big" VTEC profile is becomes your only cam profile. This is good news for all the 8th gen Civic owners who are pining for a swap. CHECK OUT: Swapping the Civic Type R Engine into an Older Chassis. The final test-fit is a 2001 Honda Civic, 7th generation, which Gillespie says is a stand-in for the RSX and EP3 since all three have very similar engine bays. I did some optional stuff (Type-S oil pump, RBC intake manifold) to make it better, but the stock swap would be pretty easy. You can use the ep3 harness, just change over a few sensors and extend a couple wires. I still have the 5 speed and I wish I had another gear for highway driving. The Honda Civic/Honda Integra K20 Turbo Kit is capable of 500+ bhp without any hassle. The turbo unit itself is rated well in excess of 500bhp. Making the Tuning Developments EP3/DC5 Turbo Kit the perfect choice for your Civic or Integra! Power Output – On Our Dyno Dynamics Rolling Road. Standard Car – 190-200HP @ Flywheel. I hate to ask such as basic question. I ordered a K20A swap and I was given the choice to have either a Civic Type R K20A (EP3) or a Integra Type R K20A (DC5). The shop told me they're identical, but in the FAQ's, it says the EP3 motor is rated at 212 hp while the DC5 motor is rated at 217 hp. Does anyone know what makes them different? Stock computer my roommates EP3 civic made 155hp and 125Tq. It has a short ram intake back by the header,RBC ,OBX Race header for the EP3,world sport exhaust. It made 160/130 on hondata 91octane base mape. should make more with tuning. internally stock EP3 civic motor not RSX. That base manifold is killing you. Buy Genuine Honda Civic Type-R EP3 / DC5 Engine Performance Brace 2001-2005 (74230S6M000) from Cox Motor Parts. Learn more. Certainly as quick as the EP3. The extra weight is negated by shorter gears, lower vtec at 5400 instead of 5800 rpms, and seem to dyno standard at 200 bhp plus, whereas EP3's werent making claimed 197 bhp. Handling wise - bit more composed and less 'manic', but all in think it is as good on the road. qGdIe.