X40 Stock 140mm Fan

i ordered a cougar fan you can see here http://www.newegg.com/Product/Product.aspx?Item=N82E16835553007

to replace the stock fan, i want to know is it a crappy fan or should i keep it for push pull 

It will be much more useful in push-pull than not being used at all. It is probably crappy, but it's something extra, at least.


i hear you on that 1 but i have an NZXT blue led fan on the back for the cougar wondering should i just remove the stock fan & have these two in push pull http://www.newegg.com/Product/Product.aspx?Item=N82E16835146020 Led in the back cougar in the front