We bought this rather than drive two hours to the VW dealership to pay an outrageous $: it's perfect for replacing an air intake hose that has snapped.
Noticeable difference after installation as stock intake manifold and hose are worn. Combined with the APR Carbonio intake duct, the air returns to the intake duct where it belongs.
I purchased a used APR Carbonio Air Intake for my MK6 GLI Jetta and it was missing the flex boot required for installation. This boot from Specter was a great replacement. High quality and looks just like it does on the APR website (for a small price).