They're all plastic tank and aluminum core these days. Make sure that you get one with the same number of rows. I found some places carrying cheap ones that were single-row, and my original was 2-row. In addition, make sure that the flanges are not too thick for the clips that the retaining bolts go through. All the aftermarket ones had flanges that were too thick for the clips, so I could not bolt them in place. Had to go to the dealer, found the OEM was $40 cheaper and also it fit. But today, they're probably no longer carried at most dealerships.