The Mishimoto aluminum radiator for 2004–2008 Mazda RX-8 manual-transmission models is a direct OEM-fit performance upgrade. Its dual-row brazed aluminum core with polished end tanks increases fluid capacity and heat dissipation, and the design is claimed to improve cooling efficiency by up to 30%. It installs without cutting or modification for straightforward replacement.
Mishimoto 04-08 Mazda RX8 Manual Aluminum Radiator