GKTech - S13 240SX REPLACEMENT OVERFLOW COOLANT TANKOne of the most common problems with S13 silvias and 240sx's is cracked overflow tanks. GKTECH have made these to the highest standards and to be a direct replacement of your standard overflow tank. Our overflow tanks are stronger than factory and are guaranteed to last the test of time! 100% direct replacement of your standard overflow tank A direct replacement of the OEM S13 240sx unit Stronger than the factory overflow tank. GUARANTEED! FAQS Do you