Regarding the size of the cooler, what you've got to think is, this is a single pass. Basically, the twin pass ones, are like having two coolers, one on top of each other. If you were to put them side to side, there wouldn't be much difference in the cooling surface. Intake temps are no different to with the old cooler. I can run a slightly bigger cooler if needs be, and it will match up to the pipes perfect. No need as of yet though.