You got air or non-air?

It's pretty straightforward, the only PITA part is compressing the spring, unless you can have a garage compress it for you (literally 5 minutes job to do the swap). The only special tool you need is a 18mm bicycle wrench, which is ultra-thin.

Good Luck!!!

__________________
01' 3.0i E53 (M54) with 164,000 miles
07' 3.0si E83 (N52) with 134,000 miles
08' 3.0si E70 (N52) with 91,000 miles