[nickm]

Depends on what you consider important.

if its cosmetics you might want to buy a complete setup from these guys:
http://www.caractere.com/index/catalog/brand/1/model/8/version/21
or
Hofele Design | Tuning and Styling for VW Touareg II (7P) | Car body & Design

If you want to impress the die hards on this site, cosmetics alone won't do it. You may want to chase down a V8 TDI engine and drop that into your ride...without a doubt doing that would make it the baddest ass Touareg on this side of the planet.

 

[nickm]

On trying to retrofit factory air suspension....forget it. It would be less costly to sell your Touareg and buy a Cayenne diesel with air suspension.

 

[nickm]

Is there any chance my 2014 engine bay would even be able to house the V10 TDI, if I were able to get my hands on one of those suckers?

How epic would that be!?

With taste,
Touareg TDI owner for life(s)!

It won't fit a V10. Itll fit a V8 TDI. The V8 is much more powerful, lighter and smoother than the V10 could ever hope to be. So in reality V8TDI>V10TDI in every aspect ie:

V10 = 313hp, 553tq PD technology (lotta clatter and rough)
V8=385hp, 627tq ( CRD technology no clatter and silky smooth)

The V8 responds better to chip tuning since it uses a 4 valve head vs the V10s archaic 2valve heads

You can get V10 power numbers out of the V6 TDI with a good tune...plus an engine with half the weight. So while the V10 was cool in 2003, its not really relevant in 2015.