Flexfab 5415-400, 4.00" x 3 ft, 3-Ply Glossy Blue Silicone Coolant Hose, 102mm

Get a clean, durable seal in oil-splash engine environments with the Flexfab 5415-400 3-ply glossy silicone coolant hose. Its glossy lined exterior shrugs off oil, ozone, and UV, while the silicone core won’t harden, crack, or leak — so this 4.00" ID hose keeps performing where ordinary rubber breaks down.

Why this Flexfab glossy coolant hose

• Glossy oil-splash-resistant exterior — ideal for high-performance bays where oil mist is present, which means longer service life and a cleaner look.
• 3-ply polyester reinforcement — 125 PSI actual burst rating gives a wide margin over the ~42 PSI working pressure of most cooling systems.
• −65°F to +350°F range — stays flexible in cold and holds up to under-hood heat without going brittle or soft.
• Meets SAE J20 R1 Class A & TMC RP303B Class I Grade II — documented spec-grade performance.
• 4.00" (102mm) ID × 4.32" (110mm) OD, .140"/.190" wall — precise sizing for a leak-free clamp seal.

Supplied as a ready-to-install 3-foot stick, this hose pairs with a Flexfab 2582-0064 clamp for a connection that holds through repeated heat cycles.

Backed by hpcouplers’ fast shipping and easy returns — order with confidence from a trusted industrial hose and coupler supplier.

• FlexFab Series: 5415
• Part Number: 5415-400
• Inside Diameter (ID): 4.00" (102mm)
• Outside Diameter (OD): 4.32" (110mm)
• Hose Length: 3 feet
• Wall Thickness: .140" / .190"
• Weight LB/FT: 1.28
• Actual Burst Pressure - PSI: 125
• SAE J20 R1 Class A - PSI: 50 PSI
• TMC RP303B Class I Grade II - PSI: 100 PSI
• Extreme temp range: -65F to +350F
• Construction: Glossy Blue Silicone hose with 3-ply of Polyester reinforcement