Expansion Tank w/Filler Neck

The Expansion Tank w/Filler Neck (ALL 36116) from ALLSTAR PERFORMANCE is a critical cooling system component designed for high-performance engines, race vehicles, and custom builds where precise coolant management is essential. This recovery tank serves to capture excess coolant overflow, maintain system pressure stability, and prevent air pockets that compromise cooling efficiency. Whether you're building a street rod, maintaining a race car, or upgrading an existing cooling circuit, this aluminum expansion tank eliminates the guesswork of coolant handling and protects your engine investment.

Constructed from durable aluminum in a natural finish, this expansion tank features a convenient filler neck for easy coolant access and maintenance. The tank accommodates a 1-quart capacity, making it ideal for mid-sized engine bays where space and weight optimization matter. Inlet and outlet connections are provided via 1/2-inch NPT and 1/4-inch NPT fittings respectively, allowing flexible integration into existing or new cooling loops. The filler neck design reduces spillage during top-ups and provides a secure point for mounting within engine compartments. Aluminum construction ensures longevity while keeping overall system weight minimal—critical for performance applications.

This expansion tank benefits street rod builders, race teams, and performance enthusiasts seeking reliable coolant management on custom-built or heavily modified engines. Installation is straightforward: position the tank above the radiator water pump inlet, connect the 1/2-inch NPT inlet line to the main cooling circuit outlet, and route the 1/4-inch NPT outlet back to the radiator or overflow line. Compact dimensions (12.05 × 6.9 × 13.95 inches) allow fit in most engine bays without requiring extensive rework. Compatible with all coolant types, this tank is an economical upgrade that extends engine life by maintaining optimal coolant levels and eliminating cavitation.