Hey all first question posted. They make custom intake manifolds and elbows for the 6.0, D-Max and the Cummins. Is there any modifications that can be done to the intake manifold of the 7.3?  

What year? There's not much for the IDI diesels, but plenty for the 7.3 Power Stroke. More info please.    

Sorry about that, should have known to include year. It is a 2001. I already have done a Tru Flow filter, it does breath well, also straight piped. It seems there should be an improvement on the center aluminum intake connection.  

well the AIH delete mod

http://www.superdutydiesel.com/wiki/tiki-read_article.php?articleId=4

also the ccv mod

http://www.superdutydiesel.com/wiki/tiki-read_article.php?articleId=44

it is sold here as a kit

http://www.itpdiesel.com/store.php?crn=138&rn=505&action=show_detail

also you can change you turbo's comp wheel

turbo removed
http://www.ford-trucks.com/article/idx/0/002/article/9903_Turbo_Removal__Wicked_Wheel_Installation.html

turbo not removed
http://www.blackclouddiesel.com/Tech/Superior%20Wheel%20Installation%20Guide.pdf

here is where to get the wheel

http://www.xtremediesel.com/index.asp?PageAction=VIEWPROD&ProdID=260

if you need to know anything else just ask  

CCv mod. Mine looks cool. No oil in intake.