663HND rod bearings fit connecting rods for a 2.100 rod journal. Calico coated Clevite bearings has been a bearing of choice, and has been for years! These bearings are coated with CT-1 Dry Film Lubricant coatings to help reduce friction and abrasive wear. It provides intermittent dry lubrication and is not affected by dust or dirt. CT-1 is specifically engineered to withstand the extreme conditions of today's high-performance engines. Enjoy a higher level of confidence with increased embeddability, strength and durability with Calico coated engine bearings.