What pulley is this?

Yes i will try at first with the Vectra C ECU if i can find someone who can program this.

But as a backup have got my self a loom/ecu from a realy early Vec C Z20NET.
Then i'm home free so to speak. Since this is no problem to program this ECU with a good program that works with the SC instead of a turbo.


Stupid Bollocks
the zzp one is hub based so all you have to do is unbolt that one and fit what ever size you want/need 3.1 is what i fitted and then had to have a massive rpm cap
the standard one is 3.3" and push on