Rev9Power Rev9_RD-207; Mazda Rx8 03-11 Radiator Product Details 03-11 MAZDA RX-8 RACING ALUMINUM RADIATOR will fit: - 2003 2004 2005 2006 rx8 - 2007 2008 2009 2010 2011 rx8 RADIATOR SPEC: core size- 638 X 359 X 39 mm (core size) inlet / outlet : 1 .4" - 100% light weight aluminum - direct bolt-on - perfect for street or strip - 40% more cooling efficient then stock manual transmission only