1000Cfm 4 Barrels 1.75" Core Barrel 4150 Flange Carburetor Throttle Body Cast Aluminum New CNC For Chevy GM LS1 LS2 LS3 LS6 LS7 LS9 LSX Chevrolet Ford 302 SBC. 1.75" throttle plates mounted to PTFE coated throttle shafts for high flow and a smooth feel.