The ETS Saab 9-3 intercooler unit features smooth flowing end tanks and a highly efficient bar and plate core. The core is 100% vacuum brazed, and features louvered external fins, and a very fine internal fin pack. To attain the maximum efficiency possible, the internal fins are offset and staggered to get every possible air molecule to "scrub" up against an internal fin so that the heat may be transferred to the external fins and carried away from the intercooler.