This 36.5 x 8 mm valve guide is designed to fit the cylinder head of the Volkswagen Golf 1, as a replacement for a worn, damaged or missing guide. It is suitable for both inlet and exhaust valves, depending on the original fitment. Please note: depending on the year and engine type of the Golf 1, two guide lengths exist (36.5 mm or 42.5 mm); it is essential to verify the dimension of the guides on your cylinder head before placing an order. Once the guide is installed, honing is necessary to precisely adjust the internal diameter to the valve stem, an essential operation for a careful restoration.