The 6297 ARC Rod Bearings are the replacement bearings used in the ARC 6279 Billet Rod for the Briggs Model 31 and Model 33 AVSEngines. 

Babbitt Bearings are used to reduce friction, prevent wear, and can increase load-bearing capabilities. If you have ever used a stock rod in a mildly modified engine that turns twice the stock rpm, the stock rods usually do not last very long due to not having a babbitt bearing to ride on. This makes the bearing an important piece of technology used in rods for performance and longevity.