Boss Automotive Systems B-15N filter innards

So now you can see whats inside without having to actually buy one. The bottom pops off easily with a small screwdriver. I might just add a VDR across the output on the underside of the PCB to snip off any voltage spikes although thats a pretty large transformer so perhaps I'm being paranoid! The case is plastic but the photos might lead you to think it was metalic.

Done