Finally found a pre cat pipe for the vectra 1.9 cdti.

http://cgi.ebay.co.uk/VECTRA-C-PRE-C...89764662860886

gonna get it fitted in next few weeks, already removed main cat when i had new twin exit exhaust system fitted, and that made a difference, and nice little turbo whistle, fit pre cat then off to Courtney for a remap. Happy Days