This is for the older style 3 piece OPRV. I recently replaced the oil cooler housing o-rings and gaskets and found one on Thingiverse but I made this with a larger shoulder so it's easier to sit it square in the housing.
I printed in PLA with 5 walls and about 50% infill with random seam. Probably overkill, bit it worked perfectly for the job.
If your printer produces z-seam zits it might need some light sanding on the thinnest part where it slides into the block.
