I think that for those looking at mild mods only (ie. Tune & Air intake & Center muffler) this seems to be the current status (approx): BA - Stock: 200rwkw - Tuned - 250rwkw BF - Stock: 200rwkw - Tuned - 250rwkw FG - Stock: 230rwkw - Tuned - 280rwkw In each Tuned case the injectors are at their limits (ie. FG has better flowing injectors). PS. BA/BF manuals need a clutch upgrade at 250kw, not sure if FG needs clutch upgrade at 280kw ??? Beyond the power levels above, you have to start swapping injectors, springs, intercooler, cat etc. The FG XR6T seems to be 0.8 seconds quicker in stock form 0-100km/h and 0-400m than BA/BF, so mildly modified to 280rwkw, I think that it would be a monster!