Originally posted by Gruff511
That shows you exactly why you want a catch can with baffles. If moneys tight then go with the ebay one at put some extra material inside like the first link you posted, as it seems easier to unscrew the top then cutting it in half lol IMO: I dont even use one. I just run rubber tubing from the valve cover down facing under the car to relieve any pressure and oil vapor out.

That works fine but is frowned upon at tracks, so if you plan to race your car then you should invest in a catch can. And if you are getting a lot of oil collecting in it I have seen some cars that run the catch can drain back to the oil pan.