what i've yet to see in this thread is
the comparison between the Powerchip's
cost and Dinan's upgrades. a Stage 1 upgrade
from Dinan is $4144 and produces 349hp/374tq.
um, that's only a 9hp/14tq increase for an '03 4.6is.
Powerchip claims a 27hp/21tq increase for an '03 4.6is.
that's $460.44 per HP w/ Dinan vs. Powerchip's $23.7 per HP.
so, i'd say, Powerchip's pricing sounds pretty reasonable.

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