The mugen box would be nice but $1000 dollars compared to $250 delivered from the States for a Comptech unit....I will take the Comptech but with and ITG filter (sorry I am biased with these filters from experience). Also the Mugen was not designed for the K24 motor but the K20 what difference this makes I don't know in real terms but at least the Comptech was designed for the K24 engine.