Gizmo's Racing modified Walbro WT-257 carburetor is bored and the mouth of the carb has a radius inlet to allow a smooth and even entry of air into the intake duct with the flow stream adhering to the carb walls.

The flow-contoured entry is designed to reduce boundary layer disturbance as high velocity air enters the intake path. Results include improved air stability and increased engine performance.

**The carburetor also comes with the needle clamp and stainless Button Head screws.**

NOTE: THESE ARE PORTED ON A CNC MACHINE SO WE CAN GET PRECISE BORE SIZE EVERY TIME.

Here is the video of the mod being done on the CNC machine.