These are big valve heads, 44mm intake and 40mm exhaust, they have 40mm carb inlets and 38mm exhaust ports. They do look to be in good condition, all fins and threads are good. The spark plug with the spacers are for the lower holes. We try to photograph any defects so please, view pictures carefully. Parts were removed from a 1983 R100RT with 83K miles. Paint is Magenta Red code 572. Therefore, parts are used and may not be in perfect condition. Many of these parts may interchange with some other BMW motorcycles. It is recommended for purchaser to consult with BMW Parts Microfiche or a BMW motorcycle shop. Part…