Are you guys weighing any of the stuff your removing to figure out how much weight your saving?
BTW which Sparco wheels? and how much do they weigh?
Reducing unsprung rotating mass is huge for improving acceleration and fuel economy.
On my Suby I ditched about 70lbs of rotating mass. And close to 200lbs of dead weight.
On the focus a change like that would be huge for fuel eco and acceleration