Upper Radiator Hose 1-1/2 x 25

The Upper Radiator Hose 1-1/2 x 25 from ALLSTAR PERFORMANCE is the go-to replacement component for engine cooling system maintenance and high-performance builds. This hose bridges the gap between your radiator and engine block, handling coolant flow under varying temperatures and pressures. Whether you're rebuilding a classic hot rod, upgrading a street machine, or simply replacing factory hoses that have degraded over time, this proven design delivers reliable performance without compromise.

Engineered with a 1-1/2 inch inner diameter and 25-inch length, this radiator hose accommodates the flow rate and physical routing demands of most small-block and mid-sized engine platforms. The construction uses premium materials rated for sustained coolant temperatures and resistant to heat cycling degradation—a critical factor since repeated thermal expansion and contraction is the primary failure mode in stock hoses. The hose's flexibility allows for proper fitment around engine bay obstacles, while internal reinforcement maintains structural integrity under system pressure, typically 15 PSI or higher depending on your thermostat configuration.

Mechanics and enthusiasts building street rods, muscle cars, and vintage truck restorations rely on ALLSTAR PERFORMANCE hoses because OEM replacements often carry premium costs and extended lead times. Installation is straightforward using factory-style hose clamps—no special tooling required. The 1-1/2 x 25 configuration is compatible with most American V-8 upper radiator inlet applications, though fitment should be verified against your specific engine and radiator combination before ordering. This is a consumable component; replacing your cooling system hoses every 5–7 years or at major overhaul intervals prevents catastrophic coolant leaks and engine overheating.