i found this...it right????






the difference in the USDM B18C1 and the JDM B18C1 is the ECU maps(more agressive because of fuel availiable) and the fact they have higher octane gas over there available at the pump and Less restrictive emissions. So these 170hp B16's and 180hp B18c's are just like USDM engines with the exception of compression ratio and other small features that protect the engines life