[RahX]

I'm pretty sure they base the size of the intercooler on how much air it can cool to attain xxx horsepower. So you could assume a 600hp intercooler is good UP TO 600 hp on a boosted engine, that is only if your engine can make that much power. I'm also pretty sure it is an estimate since not all combinations are the same. It would be like putting 4" exhaust on a 4cylinder when you only need 2". Now on the other hand I would assume that a larger intercooler might affect your boost if you aren't near 600hp since it is a larger volume cooling more air effectively dropping pressure. Again, it is like the 4" exhaust on a 4cylinder. I would plan your build accordingly and get one that is closer to what you need. Finally, to answer your question, I would put my money on the idea that 600hp is 600hp whether or not it is a v6 or a v8.