2-Barrel 500 CFM Circle Racing Track Carb Zinc Finish 5.160 x 3.460 4 bolt spacing 50cc accelerator pump 

-Side Inlet 

-Zinc Finish 

-5.160'' x 3.460'' 4 bolt spacing 

-Choke delete

-Choke horn  

-500-599 CFM 

-50cc accelerator pump

-1 timed (spark) port, 1 full vacuum, & 1 PCV port

-The mandated carbs for many oval track racing sanctioning bodies

-Calibrated specifically for circle track use