not exactly. normally, the difference in a/f caused by fitting a
CAI on a NA vehicle will be compensated for by the ecu. unless u
are changing major components in ur engine, the stock ecu will be
more then enuff 2 handle a CAI.
less drag is only a quarter of the story. by lowering, u lower
the position of ur center of gravity and induce more negative
camber at the rear end (since integra is using macpherson struts in
front, camber is hardly affected). the former gives u better
handling, the latter will make ur car tend towards understeering. u
also increase ur chances of grinding parts of ur car against humps,
ramps and kerbs. both of which are not a desirable effects.
thats not what the term implies. coilovers simply refers to
suspension set ups whereby the springs surround the shocks. in
effect, even ur stock suspension are considered coilovers. u cannot
alter the stiffness of ur existing springs unless u change them
altogether to another set with a higher spring rate which also
gives u a harsher ride.
best advice i've heard so far. IMO, there's not much potential
in the GSR engine to mod so u'd be better off doing more research
before sinking ur precious money.