Wow, I thought mine were bad when I replaced them last weekend. Mine were leaking and able to be spun from almost every joint.
From reading other threads on the CCV system, I believe the ribbed design of the OEM hose is deliberate and helps separate the oil, so the system may not work as intended with smooth hose. I’d defer to others more knowledgeable though.
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'17 Porsche C4S Sapphire Blue Metallic / Bordeaux Red - Softronic tune - Soul Sport Cats - Soul Exhaust
'13 E70 X5M Black Sapphire Metallic / Bamboo Beige - Full Dinan Suspension - Dinan Exhaust - BPM Sport Tune - xHP Flashtool Transmission Tune
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