Flexfab 5780-125X12, 1.25" x 12 ft, High Temp Red Silicone Meta-Aramid Coolant Hose, 32mm

Run coolant where standard silicone gives out with the Flexfab 5780-125X12 high-temperature meta-aramid hose. Its thicker 4-ply wall and meta-aramid reinforcement push the temperature ceiling to a remarkable +500°F while handling up to 150 PSI working pressure — built for the hottest, most hostile cooling systems across diesel, automotive, marine, agricultural, and industrial engines.

Why this Flexfab high-temp coolant hose

• −65°F to +500°F range — far beyond standard 350°F coolant hose, which means it survives next to turbos, manifolds, and EGR routing.
• Silicone + meta-aramid, 4-ply — the aramid reinforcement adds heat and pressure endurance ordinary polyester can’t match.
• 500 PSI actual burst / 150 PSI working — a wide safety margin for high-pressure cooling circuits.
• Meets or exceeds SAE J20 R1 H.T. — documented high-temperature spec compliance.
• 1.25" (32mm) ID × 1.64" (42mm) OD, 0.17"–0.22" wall — thicker wall for pressure endurance.

Supplied as a 12-foot stick, this red hose resists hardening, cracking, aging, and chemical attack including coolant additives.

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

• FlexFab Series: 5780
• Part Number: 5780-125X12
• Inside Diameter (ID): 1.25" (32mm)
• Outside Diameter (OD): 1.64" (42mm)
• Hose Length: 12 feet
• Wall Thickness: 0.17" / 0.22"
• Working Pressure - PSI: 150
• Actual Burst Pressure - PSI: 500
• Standard: SAE J20 R1 H.T.
• Extreme temp range: -65F to +500F
• Construction: Red Silicone hose with Meta-Aramid 4-ply reinforcement