I dont like catch can to vent back to intake, oil vapour can still slip pass catch can. Put a breather on the can and u will never have any issue.
If u r worried about yellow sticker, I have a solution:
Get a check valve(red) for a air compressor, and hook it up to drain nipple of the can with a fuel line. When u need to empty the can, connect the line with a hand pump (orange), open the valve and suck the oil out.
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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR
Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport
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