Weird - Need an Assist

[Bootlegger]

OK. I'm new to the forum and just purchased a 04 Boxster S Anniversary w/ 32K miles. I've been around cars all my life and have advanced mechanical skills. I am new to the Porsche scene. This car is a garage queen and is extremely clean. I changed the oil last weekend and cut the filter - perfect. I have an appointment to get the IMS Solution at a local Porsche expert (Kraftworks) in several weeks. Today pulled the engine cover and discovered the air box takes a round ? (2005+) filter. Oh crap... I purchased the 2004 because I could replace the IMS with a permanent fix and I factored that into the purchase price. So I pulled the engine serial number and my engine is a 2004 based on the serial #.

Has anyone ever seen a 2004 with a round (2005+) air filter housing? Am I thinking too much on this one? My engine #M96/2467405027

Thoughts?