Hey all need advice please. I have a 2012 xr6t Just had my car tuned after 2nd lot of mods, 1st mods= dump, cat and tune which produced 270 rwkw. 2nd lot of mods= battery relo, cooler n pipes, 400 pump, 1000ccs, w/gate n flapper mod + 12 psi actuator, twin 2.5 catbak, braided oil line, after tune still only 270 rwkw!!!! My tuner told me that the impeller isnt big enough and cant produce enough boost/power. I want to know why or how with all these mods is my car not producing any more power??? Im absolutely baffled to be quite honest!! Is my tuner having a lend of me? Has he not tuned correctly?? Any expert advice would be greatly appreciated.