I just dropped in a newer B18C5 into my 93 civic 2 dr ex, will a 92-95 civic Apex Gt spec exhaust system still fit on the b18 or do i have to get an integra or a custom system?

you want to get an exhaust for your chassis. Otherwise the pipes would be routed wrong and the length would be off too. So you want one for a 92-95 civic