I got this for a very cheap price. It's very large compared to most of the common Modine sandwich oil/water coolers. It appears to be aluminum. The tag on the back says that it's made by Long - Dana Coporation - Long manufacturing division in Rochester Hills, MI EXPERIMENTAL USE ONLY I wonder if this was a beta version of some project that was abandoned I sure hope that they didn't fail some longevity/endurance test. I hope that it was purely economic/demand in nature I got it for less then I usually pay for used Ford/Modine offerings. I'll usually go around $40 delivered for them. btw- if any of you intend to buy one from this vendor ..just let me know so I don't compete with you in future auctions. If I can get them for the price that I want ..I buy them. I have just about every configuration of the Modine versions and have adapted them to several vehicles that they were not spec'd for. One that was for a F150 ..that has long hose fittings ..fits just fine on my daughter's Taurus with the Vulcan V6. You just have to use a short filter (PH16 or PH3614) instead of the FL400S. The current auction for this item from the vendor that I purchased it from.