Yes Indy makes a intake for magnum heads. I just got mine back from having it gasket ported. If you can buy a magnum m1 intake for 400-400 I say but it. When I bought my Indy intake last year any m1 magnum intake I could find was listed for $600 . I lucked out and found a guy needing money, I bought my Indy intake for 300 shipped. I think they are over 500 new now.