Ebay one looks like the same type the this guy used:http://forums.evolutionm.net/evo-how-tos-installations/485682-how-another-diy-catch-can-mod-dual-baffles-extended-inlet-tube.htmlNot sure how much money he really saved, but it was an interesting read.Edit: Found another interesting article here:http://forums.swedespeed.com/showthread.php?150325-Oil-catch-can-research-the-not-so-baffling-importance-of-bafflingGuy used a wet dry vac and water sprayer to test an ebay catch can with and without cheap baffling to see what difference it actually makes.