GKTECH S13 SILVIA / 180SX REPLACEMENT OVERFLOW BOTTLEListing is for: 1x Overflow bottle One of the most common problems with S13 silvias and 180sx's is cracked overflow bottles. GKTECH have made these to the highest standards and to be a direct replacement of your standard overflow bottle. Our overflow bottles are stronger than factory and are guaranteed to last the test of time! 100% direct replacement of your standard overflow bottle Fits both S13 and 180sx 240sx with any engine setup Stronger than