Just so all Stillen guys know.. The Type 100 heat exchanger is much nicer than that Type 101. I bought the 101 for my 350z and it weighed like 10X more than the one stillen provides. Anyone that has purchased one of these can tell you, its a tank. I don't know how efficient the 101 is but the 100 is much higher quality. Any nice heat exchanger, or radiator, I have seen are always incredibly light. This means they use good aluminum. The 101's seem like they are made in China with the cheapest materials there are.
Type 100
Type 101