There are 2 FGs in QLD running around with the New PWR stepped cooler in them. One is mine. For me the appeal was ZERO cutting of the stock car in any way. Im not sure on insurance companies finer details or criteria, but for me avoiding hassles in the unlikely event of an accident was apprealing, due to this cooler being the only one I could find that didnt cut the car (or in this case) upper bar reo anyway... Also the appeal of the intercooler being compatible with stock pipes... or stock pipe shape equivalent, despite the slightly steeper angle of the inlet (also the added upper tank volume compared to that of the F6 Cooler) to aid flow to the usually unused upper tubes Data wise the two cars have loggers on them full time, everytime they are driven.. Logging pressures and temps at 3 points across the entire intake of the FG along with engine water temps, all compared to the stock XR & F6 Coolers... PWR when asked why the stepped cooler? Because no body else can... Anyway its not for me to ramble on about, for now judge for yourself.. Mine as one of two cars running data loggers I have 3 snippets of data from the earlier days in march..Mine the stocker of the two.. First Graph above: Sub 12.90 pass Top of first gear 0.01PSI pressure drop and an intercooler outlet temp of 1 degF above ambient. Total temp drop across the cooler at this stage was 24Deg F. (oh to the keener observer on this day the in and out TEMP channels are in reverse) Second Graph: After hitting Rev limiter in First Gear (Oooops), at half track, the pressure drop at this stage is 0.43PSI and an intercooler outlet temp of 8DegF above ambient. the Total temp drop across the cooler at this half track stage is 88DegF. By the end of 400mts and just touching rev limiter in 3rd gear (on the ZF) and the boost on the otherwise standard car lowering as it climed in speed and rpm (??). The pressure drop at this closing stage was 0.02PSI with an intercooler outlet temp of 12DegF above ambient.. Total temp drop across the cooler at this stage was 100DegF.. Anyway enough ramble from me. PWR will (I guess) tell the rest, with more on engine water temps with this cooler compared to the stock xr and F6 units and even some exh back pressure tests thrown in. Cheers