if i was to put an oil catch tank on my 1.5 lsi civic wer does it connect to on the engine. it is a d15b2 engine

 

what you'll do is connect it from the PCV valve (which on your motor i beleive is located on the valve cover) to the hole on the intake tube that goes from the air cleaner box to the throttle body.there's another place on the back of the motor that goes from a factory oil catch device to the underside of your intake manifold that you could connect it, but there's more benefit connecting it after the PCV valve as it will keep your throttle body clean, and in effect, your IAC clean also.