I had some mods done to my everyday work horse f6 fg ute 2010. It ran 278rkw standard no mods on the dyno. After mods 305rkw @800 nm of torque. Upgrades: -New high flow air box and filter from herrods -Herrod piping kit -high flow injectors -flash upgrade and tune. When I stick the car and then come to a complete stop the engine seems to be running on 3 cylinders , I think it maybe valve springs issues ? Does anybody have any ideas ? Also what sort of mods will I need to get 350rkw, Maybe cat upgrade and exhaust will give about 350rkw? What about a intercooler without chopping your chassis any recommendations are welcomed