These new gaskets fit 4150 Series 550-600 CFM Holley 4 barrel carbs with vacuum secondary, 1-9/16" throttle bores and removable jets in the secondary. List #'s 2818^, 3043^, 3245^<, 3530~, 3557~, 3607~, 3793~, 3794~, 3795~, 3796~, 3929~, 4069~, 4088~, 4234, 4399^, 4698, 4742, 6189^, 80145 , 80570, 80670, 81570, 81670, 83570, 83670, 85570, 85670, 86670.
