BMW S14 Billet Main Bearing Caps Our billet main bearing caps are precision CNC machined to ensure superior   quality. We offer a range of materials to suit your particular application. These   billet main bearing caps should be purchased for any high horsepower builds   to manage bottom end stress and flex. In addition to flex and stress management   these billet main bearing caps improve main bearing life, which is imperative   to ensure the lengthy engine life. They are designed to be a bolt on application   and only require a line bore after installation to ensure proper clearances. Materials Available:   4140 Chromoly Steel   7075 Aluminum   Titanium Price: $849.00