Golf mk4 2.0 air intake hose. Question in comments. : r/MechanicAdvice
MK4 INDUCTION KIT OR STANDARD AIRBOX WITH CA FEED | VW Golf R32 Forum
Amazon.com: runmade Secondary Air Injection Pump Hose Pipe SAI Set Kit 2Pcs Compatible with VW Jetta Bora Golf MK4 1.8T Compatible with AUDI A3 TT S3 1.8T : Automotive