you are correct. Mine came off a B20B4 engine from a CRV. I cannot use it for my swap because of clearance issues on the driver side since it is a 3 groove pulley (alternator, power steering and A/C). I need another one with just one groove for the alternator, it would give me then enough clearance. Send me your email address by pm and I will send you pictures of the pulley, the little key and the engine it came off.