Gen2 Reservoir Fill Cap w/Dip Stick

The Gen2 Reservoir Fill Cap w/Dip Stick from K.S.E. Racing is an essential upgrade for serious engine builders and performance mechanics managing custom cooling and fluid systems. This precision component replaces OEM caps on second-generation reservoir tanks, combining a functional fill cap with an integrated dip stick for accurate fluid-level monitoring without breaking the seal or losing system pressure. Whether you're building a high-horsepower street engine, a track car, or a dedicated competition platform, this cap ensures consistent coolant or fluid management while maintaining system integrity under demanding conditions.

Engineered by K.S.E. Racing—a respected name in motorsports component design—the Gen2 cap features a seamless one-piece construction that eliminates separate components and reduces potential leak points. The integrated dip stick graduated markings allow real-time fluid-level verification during engine start-up, warm-up cycles, or between service intervals, critical for engines running modified cooling packages or aftermarket radiators where OEM caps may not fit. Measuring 4.95 by 2.5 by 5 inches with a lightweight 0.19-pound construction, the cap threads securely onto Gen2-pattern reservoir necks, delivering vibration resistance and a reliable seal across temperature and pressure swings typical of forced-induction or high-RPM builds.

This cap benefits engine builders upgrading to custom reservoirs, drag racing platforms with severe G-force loads, and street performance applications where OEM cooling solutions fall short. Installation is straightforward—simply thread onto your Gen2 reservoir neck in place of the factory cap—and requires no modifications to existing lines or brackets. Compatibility is limited to Gen2 reservoir designs, so verify your tank's thread pattern and generation before purchase. Mechanics and enthusiasts who prioritize repeatability, visibility, and system reliability will find this K.S.E. Racing cap an intelligent choice for any serious engine modification project.