exactly cause lag? The explanation didn't make sense to me. Sorry, I'm just trying to learn here. But my understanding is that a bigger intercooler is going to provide colder air (more surface area and contains more air). And colder air is increases (typically) horse power. I would think that the $$$ vs. performance ratio was probably way too much and the money could be better spent on something else. I don't see how the size of an intercooler can directly affect your turbo lag. Like I said, I'm just trying to learn. I like to know how things work and obviously I don't know how it all works together :)