my friend has a rsx s jackson race header and he might sell out his car.... i might take his header if he dose sell it... but one thing is that would it fits on my 03 EP?

 

your going to need a custom b pipe or get yours modified any muffler shop ca do it for you

 

This is the equivalent of the whole header-cat section, right? It'll be longer than the EP's by about four inches or so, but it'll bolt up to the block with no problem. If it uses the lower bracket on the Type-S, you really should get that same bracket; it'll also bolt up to the stock K20A3 motor.

And, yes, you'd have to either get a custom midpipe or have your stock one cut & re-flanged. Or get a JDM catback originally designed for the overseas Civic Type-R.