What is a Titan Swap?
There are multiple versions of it depending on which parts of the Titan Full-Size Pickup you use.
The nice about Nissan is that all 5 cousins - the 3 midsize: Frontier, Xterra & Pathfinder - and - the 3 full-size: Titan, Armada & QX56/QX80 - are all based on the same F-Alpha platform and so, some parts are a simple bolt-on from one to the other.
Basically, the Titan front-end suspension swap on a midsize is to:
bolt-on the lower & upper-control arms, and use a special shock,
and voila, your front-end is now full-size: +3 inches per side.
There is one trick though: since the track is now 6 inches wider,
you need longer axles to compensate. The diff in most midsize is a R180a
while the Titan has a beefier diff. So one cannot use the axles of the Titan.
Enter the luxury full-size which is a full-size with the diff of a midsize.
So use QX80 front axles and your puzzle is complete.
You keep your mid-size spindle, your hubs, your brakes...
Just the axles, control arms and a better shock.
With an SPC aftermarket Titan upper control arm, up to 10 inches of travel can now be achieved for $3000 - $4000.
Here is a stock midsize suspension:
And here is a typical Titan swapped front suspension:
You can see that the stock front lower control arm is roughly 15" long with the shock mount at roughly 7".
While the Titan front lower control arm is roughly 18" (+3") with a shock mount at 8.5".
Because the arm is horizontally longer, for the same angle variation, there is automatically more vertical travel.