Thanks for all the help so far guys. One last question......
Is the EGR valve as easy to remove as it looks? Remove 2 bolts, fit blanking plate using the same 2 bolts. Attach EGR cheater to plug and wrap in electrical tape.
Are there any other pipes leading to the engine which require removing, blanking etc? Again this is on a Vectra C.
Sorry for all the questions, not very experienced with car DIY.