I've got a sohc zc. I think you can use the same flywheel for the dohc zc also like jlicrx said above. I read where the act flywheel i've got is good. I've had no problems with it so far, and it was well worth 199 bucks, easily. Not only did it make my car a little quicker, it also gets better fuel mileage. Also, there are no driveability problems with the ACT streetlight (12 pounder) in my CRX.