Holley 4 barrel carburetor with vacuum secondary. Model #4160 with 600 CFM. List number 9834. This carburetor is clean but it would be advised to put in a rebuild kit. This carb comes as photographed. Additional photos are available upon request. Thanks for taking the time to look at this item. If you have any questions, please don't hesitate to email me. Please contact the seller if you have any issues with this item before leaving any feedback.