You just need some torx tools to work on a vectra. Loosen off the manifold remove the old, clean, and insert new one. Dont use any sealant or the like. Buy a manual if youre still unsure.
trover
April 2009
buy a new one and replace it ... ;) if this isd not enough don't try it Your self
dex
April 2009
I can answer this question...
how can i fix rear out let manifold gasket on vectra v6?