USDM K series Water Pump Housing. This is what you need to convert your JDM K24 engine to use the USDM Alternator and tensioner setup. The JDM K24 water pump and thermostat housing will bolt right up to this.
You will need to buy a USDM Alternator (2004 Honda Accord).
If wanting to use a full auto tensioner setup, you can buy the Accord auto tensioner and an EP3 Civic Idler pulley.