Silicone Rubber Blue Coolant Hose, 5.39 Inch OD, 5.00 Inch ID, 36 Inch Long

Continuous service is exactly what this hose is built for. The operating range runs from -65°F up to 350°F, and that's a sustained rating, not a peak or intermittent figure. For a truck running hard in high-heat conditions, that ceiling gives you a solid margin above what most cooling systems will ever throw at it. The 4-ply silicone construction with polyester reinforcement also helps it hold up over time rather than softening or cracking the way some rubber hoses do after repeated heat cycles.