These new gaskets fit 4150 Series 650-800 CFM Holley 4 barrel carbs with vacuum secondary, 1-11/16" throttle bores and removable jets in the secondary. List #'s 2668^, 3977 , 4118 , 4129 ~, 4168 ~, 4174 ~, 4279 ~, 4280 ~, 4345 ~, 4456 , 4511 ~, 4513 ~, 4514 ~, 4515 ~, 4516 ~, 4609 ~, 4627 ~, 4628 ~, 4647 ~, 4653 ~, 6127 ~, 6128 ~, 6129 ~, 80770, 80783, 81770, 83770, 85770, 86770.
