Ive been lucky enough to lay my hands on a SS manifold as fitted to the X20XER head with the intention of fitting it to my Vectra.
No problems at the top end as all the bolts are the same layout as the X20XEV but where the 4 branch manifold bolts to the downpipe, the pipes are the wrong configuration
The standard manifold on my vec terminates like this:
Wheras the X20XER manifold needs a downpipe like this:
So, basically, I just need to know if the orientation of the Astra downpipe is the same as the vec
The manifold I have came off a pre production XER head in an Astra, im hoping it might have used the standard downpipe and i'll be able to butcher one in my local scrappy.
If not, Ill have to try powerflow and see if they can manufacture one to order
Cheers for any help