Yes - those are considered "extra fans".
These are random examples of "non-stock" cooling:http://www.newegg.com/Product/Product.aspx?Item=N82E16835103055http://www.newegg.com/Product/Product.aspx?Item=N82E16835108109&Tpk=liquid%20cooling%20kit
IOW, removing as much heat as possible from the cpu as fast as possible.
Stock cooling refers to using the cooler that comes with the purchased cpu. That cooler is designed to keep the cpu under red-line under normal, stock, operating conditions.