Car is a Audi S5 2008, direct injection, 8 cyl.
I will be removing the intake manifold to clean the intake ports of carbon. In the process, the fuel rail needs to be removed. The injectors aren't screwed down, so some may be stuck and come out of the intake port, while others will only be removed from the fuel rail.
The seals only come as a kit (pieces 5,6,7,9 of the diagram), and are quite pricey. Should I replace all the seals, even if they're not damaged? Will I be asking for trouble (fuel/vacuum leaks, performance issues) by re-using the same seals?