sorry for all the long posts,
but either way you slice it, this is an excellent mod that does gain you more HP and torque than most any other mod out there and its technically the cheapest.
and its STOCK! lol
$250 for a manifold with valve adjusters (used)
and 300 for base tune.
and the outcome is more HP than any exhaust or intake and is cheaper or at similar cost.
if anything this mod should be embraced as its the cheapest HP to dollar amount that can be had on any non M z4