Hi all, Bit of genuine advice needed. I have a F6 FG. Car has a 4" dump, hi flow cat, and tune.(stock exhaust from cat back) Running just over 300rwkw's. Question is what's the best bang for buck ie: maxium kw's for limited spend. Not chasing big numbers & not being cheap. Car is used for work & I'm going to turn it over in 3 years so don't want to blow big $ but do want a little more KW's. What option produces bigger kw's for a FG F6? (I will go with only 1 of the 3 options) 1. PW stage 2 intercooler and retune. (expected gain?) 2. 3.5" exhaust, injectors & retune. (expected gain?) 3. CAI, 3.5" exhaust, retune. (expected gain?) Any assistance would be appreciated.