Its a v6 vectra B 2.6. Engine code Y26SE
It has manicats as standard on both banks then a 3 way in exhaust system after flexi. Decided to ditch the mani's as the cats themselves were scrap anyway when I bought the car, along with some other fettling I've managed to drag an extra 40bhp out of it on standard management.
Getting fed up of the EML glaring at me though, its either leave the sensors in and get p0420 & p0430 or blank the bosses and work around - saves spending £150+ on lambda sensors I'm not even using.
I've been looking at getting it mapped but can't find many places that can map it, the one place I did find locally didn't even intend to map on the rollers
Might buy a dimsport genius and have a look at mapping it myself along with some dyno time, that way I could remove the post cat lambda's completely.
Anyone reading this with experience of dimsport genius 2, please chip in with how well it works etc.