This is the center locating tab main bearing set for the A+ 1275 engine. Note ungrooved bearing in main cap, see photo. Normally supplied as AE-made product in sinter-fused bronze material or King bearing in tri-metal. Available in STD-010-020-030 sizes, select from drop down window.
For race/high performance applications, see VPM91886 Vandervell VP2 bearings or convert block to accept VPM91120 offset tab bearing for full diameter oil groove.