id like to start off by asking the Nissan sentra and the nissan pulsar, do they share the same oil filter as im buying from an american website im not 100% sure on this... reason for asking is because the oil filter on a FWD Sr20 motor is a pain in the ass to get off and im thinking of buying a K&n oil filter with the nut welded to the top of the filter.

http://www.knfilters.com/search/product.aspx?prod=HP-1008

so i assume that will work on the Australian delivered Sr20?

Yes it should work