Mishimoto MMRAD-GTO-05 Pontiac GTO Performance Aluminum Radiator, 2004, Silver Direct fit for the 20052006 Pontiac GTO Overall Size: 31.95 x 19.65 x 6.38 / Core Size: 26.55 x 17 / Rows: 2 Inlet & Outlet: 1.375 / Core Thickness: 1.96 / Tank Wall Thickness: 0.08 TIG-welded aluminum radiator reduces coolant temperatures by +15F Mishimoto Lifetime Warranty