CSF 04-08 Mazda RX-8 Radiator

If you're looking to keep your 2004-2008 Mazda RX-8 running cool, especially if you've added performance parts or plan on hitting the track, this all-aluminum radiator from CSF is a solid choice. CSF has been making radiators for over 50 years, so they know how to build them right. This isn't just a stock replacement; it's built to handle more heat than the original, whether you're dealing with spirited driving or serious track time.

What makes this radiator work so well is its core design. It uses CSF's B-Tube Technology, which is a bit different from standard oval tubes. These B-tubes are shaped to increase the surface area for heat transfer by about 15%, essentially giving you the cooling efficiency of two smaller tubes in the space of one. Combined with multi-louvered fins that are precisely aligned to maximize airflow, this radiator is designed to reject heat effectively. The brackets and fittings are CNC machined for a precise fit and durability, and it's a true drop-in replacement, meaning you can reuse your original hoses, AC condenser, and fan shroud without any modifications.

This radiator also features a hand-polished mirror finish, giving it a clean look under the hood. It includes an all-aluminum race-style drain plug for easy draining when it's time for a coolant change.