Guys, read the thread about the lower plenum carefully before you buy one. With the lower plenum in place, the test car lost 10-15HP and TQ all the way through the powerband except the last 800 or so RPM, and shifted the new peak power up some 500+ RPMs. Check out the stated specs for the 300HP Zs - even Nissan shows the loss of torque in the spec sheet.
IMHO, while this might be a worthwhile mod for a lightweight sportscar that sees a lot of time at the extreme upper ends of the tach while on a race track, I don't think this is what we need on a 1000lb heavier vehicle.
On something relatively heavy like our FX, torque and mid-range power are king. And the track lower plenum definitely loses torque and mid-range power.
Just something to consider.
Matthew