Our line of universal U-Weld-It radiators makes it easy for budget-minded builders to get a custom, professional-quality, no compromises aluminum radiator. Performs Under Pressure Constructed of lightweight, 100% aluminum, we furnace braze the radiator assembly for maximum durability and performance, no epoxy and gaskets here! Epoxy acts as an insulator, causing radiators to heat unevenly, and this stress combined with the vibration from racing can break epoxy seals and leak or separate over time. Furnace-brazing minimizes fatigue from the rapid heating and cooling cycles. Since all the metal parts are fused together with a metal joint, they conduct heat evenly between the tanks and the rest of the assembly, preventing uneven expansion between the fused pieces, keeping the joint strong. We include a billet filler neck to ensure a strong seal under high pressures that will outperform cast filler necks with an industry standard 1-5/8” inner cap diameter and a 1/8” NPT overflow port. Maximum Cooling Performance For your custom build, this u-weld-it kit can be configured in a downflow or cross-flow configuration depending on your application. Our single pass design uses two rows of 1” wide aluminum tubes which have more surface area than copper radiators, cooling the same as five rows of copper tubes. A dense fin structure adds an additional layer of strength to the support tubes, better directs air flow and has more area to transfer heat. The core is 2.25”, a perfect balance of maximizing directed airflow and heat transfer. This radiator is built for one purpose, cooling your engine. No transmission cooler maximizes cooling efficiency. Easy to Configure, Multiple Sizes Our universal radiator isn't made for any one specific car or truck, but we offer options to make it fit your race car or custom project. Since we didn't add mounting brackets, this means you can easily adapt our radiator to any build