OK now there isn't a lot of room in the tiny civic engine bay, so I want to get a clutch flywheel and header before I swap the h22a in. I have received suggestions to just get the stock flywheel lightened, as an aftermarket one could hinder vtec performance. However it was said that a vafc could ammend that. Also, I know the jdm h22a exhaust manifold is good, so going with a dc sports or something wouldn't be the best use of money. But I've heard there's a good one out now, ARP? I'll be slowly modding the motor, maybe do some internals eventually when I get some $. But I will have a vafc. Well I appreciate your suggestions.