Hey guys, i need help with what to do, i just traded and got a ba xr8 boss 260 ute, its got full herrod race extractors to high flow cats and twin 3in exhaust, herrod thottle body spacer, growler intake, oil breathers, and X3 flash turner, it is very quick... i havent put it on the dyno yet but im thinking around 250 to 265rwkw... it has a tune on it at the moment called jacks tune... which im unsure about the details... but what kind of tune or things i should ask for to get the most at the rear wheels??