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 Water Pump and thermostat housing will bolt right up to this.
Skunk2 Pro Series 74mm Throttle Body. B series Flange (Same as 2000-2005 Honda S2000 F series). Will fit your stock S2 (00-05) Intake manifold or KPower RWD Intake Manifold. Annoyed with a sticking throttle plate? TPS positioner rattle itself loose? This is your cure.
Skunk2 Alpha series 70mm Throttle body. B series fitment (same for 2000-2005 Honda S2000). Will fit the Kmiata Kswap Intake manifold. Uses B series TPS/MAP sensors. This has been the best budget throttle body we've used. We've seen many of the cheap throttle bodies stick and rattle apart. We've never had that issue with the Skunk2.