This new part is used on Holley 4 barrel models 4160 carbs with 585 CFM and Vacuum Secondary, also accelerator pump transfer tube. Gasket is ~ 0.065" thick. You will receive ONE gasket. NOTE: THIS GASKET IS USED ON LIST # 4749, 6160, 6231, 6252, 6253, 6254, 6255, 6256, 6257, 6270, 6290, 6515.
