Vehicle is a 2005 Cts 3.6....no mods exsist outside of the normal bolt on's. Which makes me think outside the box. Iam thinking of lightly porting the sharpe edges of the entrance runners (where my finger is pointing to in pic) as it has a dramatic lip that I believe holding back incoming air from running freely...lemme know what ya think...lemme know if iam wasting my time....Thanx....
Pic of underneath upper intake manifold
Pic of edge to be ported
Pic of underneath upper intake manifold
Pic of edge to be ported
Last edited: