Alum C/O Sleeve 7in JRI

The Alum C/O Sleeve 7in JRI by Allstar Performance is an essential coolant overflow sleeve designed for high-performance engine builders and street/race car enthusiasts who demand reliability under extreme conditions. Whether you're running a carbureted small-block, big-block, or modern fuel-injected powerplant, this aluminum overflow sleeve manages coolant expansion and circulation without adding unnecessary weight or complexity to your engine bay. It's engineered for durability and ease of installation on vehicles requiring direct-fit cooling system solutions.

Constructed from lightweight aluminum, the Alum C/O Sleeve 7in JRI provides superior heat dissipation compared to plastic alternatives, preventing coolant degradation in high-temperature environments. The 7-inch length accommodates popular engine bay layouts, while the JRI mount designation ensures compatibility with Jerico Racing Industries transmissions and associated cooling packages. Allstar Performance's precision manufacturing tolerances guarantee a secure fit that eliminates leaks and maintains system pressure integrity during sustained track sessions or street driving.

Mechanics and engine builders favor this overflow sleeve for restoration builds, bracket racing, and road course vehicles where cooling system consistency is non-negotiable. The compact 0.54-pound weight and space-efficient 4 x 2.5-inch footprint make it ideal for tight engine compartments. Installation is straightforward—simply replace your existing overflow reservoir or integrate into custom cooling setups with standard hose clamps and aluminum-safe sealant, ensuring years of trouble-free operation.