This dose not seem legal. Has anyone heard of these and know how legal they are? Interesting either way. It dosent seem nearly as efficient as the real deal. But kinda cool none the less. Especially for $75.
http://blog.rtba.co/oil-filter-suppressor-in-action/#.Uv9V6FDnbqB
http://blog.rtba.co/oil-filter-suppressor-in-action/#.Uv9V6FDnbqB