CSF 06-10 Hummer H3/H3T 3.5L/3.7L/5.3L Radiator

CSF has been making radiators for over 50 years, so they know a thing or two about keeping engines cool. If you're driving a 2006-2010 Hummer H3, especially if you plan on hitting the trails, towing, or just want the best cooling performance, this all-aluminum radiator is a solid choice. It's built to handle the demands of off-roading and overlanding, ensuring your H3 stays running at its best.

What sets this radiator apart is CSF's B-Tube Technology. Instead of a standard oval tube, they use a specially shaped 'B-tube' that's seam-brazed for extra strength. This design increases the heat transfer surface area by about 15% compared to regular tubes, giving you the cooling efficiency of two smaller tubes in the same space. This means better heat rejection, which is crucial when you're pushing your H3 hard. CSF also uses ultra-efficient, multi-louvered fins that are precisely aligned to maximize airflow through the core. They even test these designs in a wind tunnel to make sure they're getting the most heat out.

You'll appreciate that this is a true drop-in fit, meaning no modifications are needed to install it. It accepts all the original equipment components, like your AC condenser, mounting brackets, and fan shroud, and the inlet and outlet connections are designed to match the factory setup, so you can reuse your original hoses. The brackets and fittings are CNC machined for a precise fit and lasting durability. It even comes with an all-aluminum race-style drain plug and a hand-polished mirror finish.