USDM B18C1 puts out 170 hp & 128 lb-ft torque
USDM B18C5 puts out 195 hp & 130 lb-ft torque
JDM B18C puts out 197 hp & 134 lb-ft torque

I've never heard of the B18C4, I don't know why that would have more torque than the C5....