*These are custom made Manganese Bronze alloy guides. The self lubricating properties of this metal increases guide longevity.

• For all our 101-115 four cylinder engines fitted with special 8mm valves 1959-94.
• Reducing the valve stem diameter from 9mm to 8mm increases flow in the ports.
• Performance is further enhanced by reducing the exposed guide length by 7mm in the port and reshaping it for better flow.
• Use seals on intake only.

See 743760D-1 for 8mm Seals