Hey mate. You from NZ? Your car looks similar spec to mine. Mine has a pro alloy RS500 Intercooler fitted and I definitely wouldn't say it was laggy. In saying that I went from a maxxed out T3 with a standard Intercooler to a Garrett GT2876R and 500 cooler in one bite so I haven't driven the combo you have. What made you change injectors? I'm considering the same move along with a good electronic boost controller.