Genuine ACL tri-metal road quality main bearing set for all A+ 1275 large bore engines. The A+ engines used a center tang on the main caps rather than offset like pre-A+ engines. These bearing are a quality replacement for any street engine, but for heavy competition use check out our range of ACL race bearings. 
 
Avalible in STD, +.010, +.020, +.030, and +.040.