Well the Duramax has go a shot in the arm. Brodix in conjunction with Wagler performance has come out with a performance head for the Duramax flow is 30 to 40 CFM better then the best ported head as cast.
Edelbrock is about 4 months out on their version of the Dmax head. I can now see a head war that will get the Dmax to 400 cfm in a few years
here is their face book page
https://www.facebook.com/WaglerCompetitionProducts?fref=ts
Edelbrock is about 4 months out on their version of the Dmax head. I can now see a head war that will get the Dmax to 400 cfm in a few years
here is their face book page
https://www.facebook.com/WaglerCompetitionProducts?fref=ts