Can anyone tell me what the corrugated hose ( metal inside, cardboard outside) that runs from the exhaust manifold round the corner to the air filter? Is called and where I would find a replacement. It is about 2 and a bit inches in diameter

thanks in advance

Warm air hose. They're a fairly generic part. If you order a beetle one, it's long enough to cut down and make 2 polo ones (yes, I am half Yorkshire).

https://www.justkampers.com/air-cooled-vw-parts/vw-beetle-parts/exhaust/heater-tubes-ducting/028-129-087-a-air-hose-50mm-diameter-beetle-1961-1998-split-screen-1962-1967-t2-bay-1600cc-1967-1979-t25-1979-1992-t4-1990-1993.html

Thank you for your help, I’ll go and get one of those!