Alcon Billet 6 Pot Callipers Leading Ø27.0/Ø31.8/Ø38.1 PairAlcon billet calipers deliver race proven stopping power with a weight advantage that counts on track. Machined from solid billet aluminum, these six pot units shed unnecessary mass while maintaining the rigidity and thermal stability demanded by high performance driving. Alcon's engineering leadership in motorsport braking ensures consistent pedal feel and fade free performance across extended sessions. The available rotor sizes27. 0, 31. 8, and 38.