Raising the bar on giving your engine some flare, the OEM Reserve Tanks look bland. Get one of our Billet Tank Replacements. Made of Billet 6061 Aluminum and then TIG Welded with Billet Aluminum CNC machined fittings and then polished to shiper high quality polish. The Filler Cap is CNC machined to fit perfectly and then hard anodized for color coordination and durability to last for years to come.