I have 4.08 gears for sale. These are arguably the most substantial N/A performance mod you can get, and will definitely have you grinning as soon as you install them. I loved having them on my Z - you can feel the acceleration increase in every gear and at all speeds.
I had these on my 6MT + Sport package. I didn't notice any changes to the cruise control, but the rev-matching was off by about 200 rpm (you just need to let go of the clutch slightly slower to compensate when downshifting)
As far as 7AT guys - here is a good review thread:
4.08 Gear Install (7AT) Review
Update: I looked through my box with the gears and found that I have the pinion bearing and the pinion oil seal which are in great shape. I will include them as part of the sale, along with an extra full bottle of Redline 75W90 gear oil which I didn't end up using.
What is NOT included in this sale are the side oil seals and the crush sleeve. These items can be ordered from your local Nissan parts dealer or online such as
Courtesy Parts. Also not included are the side bearings, but I was told that they are same as stock and therefore can be reused from what is already in there.
Pic of all the stuff attached.
$450 + shipping