1.15" x 3.56" exhaust single groove valves for 1275cc heads.
As it is possible, even common, to swap one head for another on 1275 engines, it is quite easy to become confused, or worse yet, confuse the parts-guy when it is time to order new valves! Be aware that if the head has been worked on previously, it may have oversize valves; it may have undersize it seats have been installed. Unless you are 100% sure what is in your cylinder head, it is a good idea to remove a valve for accurate measurement. There are two lengths used (nominally 3.44" & 3.56") two different keepers, (single and triple-groove) and many different head diameters! This is single groove collet type used in 12G1316 (Smog-Type), all variations of the 12G940, and the latest CAM head castings with the 3.56" long valves.