Pending some more logging i may well be needing some larger injectors... The options seem to be towards either Astra VXR ones or Bosch 550cc ones... The car will be sticking with the same set up otherwise for atleast the next 8 months so im limited to 300ish bhp im running standard S3 injectors at 4bar at the moment . would fitting the vxr items and leaving the set up at 4 bar be good or bad? The reason i ask is ... at my level of tune its a very slipery slope if i start... The VXR ones come up at 115 ish per set new from vauxhal and the best ive managed to find bosch ones at is Â£55 each plus the adaptor for the loom. so its Â£115 v Â£250+ if the first option is a good one i can just about scrape enough together for the map tweak and a B5 tip. So... good or bad idea????