The MG MGB and Austin Healey silicone fuel filler neck hose to tank, part number BHH191 - a direct-fit silicone replacement for the original rubber hose, built to SAE J30 R6 fuel specification.

Because the original rubber on an MGB is now decades old and was never formulated for ethanol-blended fuel. Silicone will not perish, harden or crack with age, and the fluorolined construction handles modern pump fuel indefinitely - so this becomes a job you do once.

Yes - built to SAE J30 R6 with fuel-rated construction for modern ethanol-blended petrol. This is the central point for classic owners: E10 in particular attacks period rubber from the inside, so an original hose can look sound while it is quietly breaking down.

A fuel smell around the rear of the car, fuel staining or damp on the underside near the tank, and difficulty filling without the pump cutting out. On a car that is stored over winter, the smell in a closed garage is usually the first sign.

The listing covers MGB and Austin Healey applications using part number BHH191. Check the number against your existing part where you can - on cars of this age, previous repairs and part substitutions are common, so what is fitted is not always what left the factory.

It is a functional replacement rather than a concours-correct part. If originality of appearance matters for judging, check what your class rules allow. For a car that is driven, most owners take the view that modern fuel compatibility is worth more than a period-correct hose that is perishing.