The standard barrier ac hose refers to the thick wall ac hose. It means the outer layer of ac hose is very thick. It aims to have a good permeation resistance and burst strength.
Replacing a worn-out power steering hose is not a trivial task and requires specialized knowledge and tools. It is essential to use genuine Porsche parts to ensure compatibility and performance. A professional mechanic with experience working on Porsche 928s should perform the replacement to avoid damaging other components in the power steering system A professional mechanic with experience working on Porsche 928s should perform the replacement to avoid damaging other components in the power steering system