Don't think you can buy a max wedge intake with a 4150 flange . at lease I could not find one . nothing available. and I run NSS so I can only run a 4150 carb. I bought T/F 270 heads and a Indy intake . It has a 4500 flange . I have hood clearest problems So most of the adapter are 2" tall would not work for me..so I bought this adapter. Very nice part .