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Silicone Rubber Blue Coolant Hose, 2.64 Inch OD, 2.25 Inch ID, 36 Inch Long

Burst Pressure 350	Brand Flexfab	Brand Flexfab	Pack Size 36.00	UOM LN3	Hose I.D. 2.25	Hose O.D. 2.64	Length 36	Supplier Part Number 5581-225	Alternate Part Numbers Alternate Part Number 5581-225, Alternate Part Number C1KH11, Alternate Part Number MI-06725393, Alternate Part Number MINO-01591X00010	Product Weight 4.10 lbs

Product Questions & Answers 2

Product Questions & Answers

Running a 2.25 inch ID coolant hose on a heavy truck setup and need something that won't give out when things get hot under there. What kind of temps can this one actually hold up to?

Question by: Roger E on Jan 3, 2026, 11:27 AM

Continuous operation anywhere from -65°F up to 350°F is what this hose is rated for, so heat under a truck hood isn't going to be a problem. The 4-ply silicone construction reinforced with polyester fabric holds up well in those kinds of demanding engine bay conditions, and it meets SAE J20 R1 Class A along with TMC RP303B Class 1 Grade 1 requirements plus most OEM truck manufacturer specs. For coolant transfer in a heavy-duty application, it's built to handle the job without degrading from temperature swings.

Answer by: Customer Support on Jan 4, 2026, 11:56 AM

got a tight spot on a truck, is that 2.25 inch the inside size or outside size?

Question by: Joyce H on Nov 28, 2025, 11:57 AM

Inside diameter is 2.25 inches, and the outside diameter is 2.64 inches. The hose length is 36 inches.

Answer by: Customer Support on Nov 30, 2025, 6:21 AM

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