I purchased an aftermarket no-name brand one on ebay for around $80 or $90 cant remember and its trash. The plastic has gotten softer and it has stretched so much in exactly one year that I had to refill the rear holes.
I should have bought an OEM one for a little more.
Yep, it has a door for the filter and a door for the drain bolt. I was the donor car for the M35x and the M56x and on both cars I also had a Fumitomo valve installed so my oil changes are as simple as opening a tap and changing the filter. No fuss.
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