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 listed may or may not fit the model listed in the header title but it is the part removed from the bike in the description. Feel free to check my listings for other items and related parts. Please subscribe to my store to get notifications for sales and new items. We work hard to have satisfied and returning customers. Thank you for choosing us and looking at our items. We look forward to doing business with you! These parts are used and should be regarded as so. Therefore it is recommended that a certified mechanic be used for inspection and installation of item.