Well i already have the Heads and the cam, which the cam i have should be great with a tvs1900... I figure if im gonna be pulling the cam and heads for a DOD/VVT delete, im gonna go ahead put better parts back on. If i went turbo like i have before on my other trucks i would agree...but i wanna go supercharger this time so i figure the h/c headers would be a great start and be even better once i FI.