Skip to content
☀️ Take an Additional 10% Off Your Entire Order with code GEARUP10 at checkout.
☀️ Additional 10% Off • GEARUP10

Flexfab 5581 Blue 4-Ply Coolant Hose

The Flexfab 5581 series is 4-ply blue silicone coolant hose, with an extra ply for added strength in high-pressure and large-diameter cooling applications.

Filters

Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant Save 20% Save %
$ 116.99
$ 116.99 - $ 116.99
$ 116.99
$ 93.59
$ 93.59 - $ 93.59
$ 93.59

Flexfab 5581-312, 3.13" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 80mm

Product Details The Flexfab 5581-312 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 116.99
$ 116.99 - $ 116.99
$ 116.99
$ 93.59
$ 93.59 - $ 93.59
$ 93.59
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant Save 20% Save %
$ 96.49
$ 96.49 - $ 96.49
$ 96.49
$ 77.19
$ 77.19 - $ 77.19
$ 77.19

Flexfab 5581-212, 2.13" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 54mm

Product Details The Flexfab 5581-212 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 96.49
$ 96.49 - $ 96.49
$ 96.49
$ 77.19
$ 77.19 - $ 77.19
$ 77.19
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant Save 20% Save %
$ 81.19
$ 81.19 - $ 81.19
$ 81.19
$ 64.99
$ 64.99 - $ 64.99
$ 64.99

Flexfab 5581-138, 1.38" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 35mm

Product Details The Flexfab 5581-138 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 81.19
$ 81.19 - $ 81.19
$ 81.19
$ 64.99
$ 64.99 - $ 64.99
$ 64.99
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant Save 20% Save %
$ 906.39
$ 906.39 - $ 906.39
$ 906.39
$ 725.09
$ 725.09 - $ 725.09
$ 725.09

Flexfab 5581-550X12, 5.50" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 140mm

Product Details The Flexfab 5581-550X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 906.39
$ 906.39 - $ 906.39
$ 906.39
$ 725.09
$ 725.09 - $ 725.09
$ 725.09
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 226.59
$ 226.59 - $ 226.59
$ 226.59
$ 181.29
$ 181.29 - $ 181.29
$ 181.29

Flexfab 5581-550, 5.50" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 140mm

Product Details The Flexfab 5581-550 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 226.59
$ 226.59 - $ 226.59
$ 226.59
$ 181.29
$ 181.29 - $ 181.29
$ 181.29
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 855.79
$ 855.79 - $ 855.79
$ 855.79
$ 684.59
$ 684.59 - $ 684.59
$ 684.59

Flexfab 5581-500X12, 5.00" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 127mm

Product Details The Flexfab 5581-500X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 855.79
$ 855.79 - $ 855.79
$ 855.79
$ 684.59
$ 684.59 - $ 684.59
$ 684.59
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 213.89
$ 213.89 - $ 213.89
$ 213.89
$ 171.19
$ 171.19 - $ 171.19
$ 171.19

Flexfab 5581-500, 5.00" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 127mm

Product Details The Flexfab 5581-500 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 213.89
$ 213.89 - $ 213.89
$ 213.89
$ 171.19
$ 171.19 - $ 171.19
$ 171.19
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 787.49
$ 787.49 - $ 787.49
$ 787.49
$ 629.99
$ 629.99 - $ 629.99
$ 629.99

Flexfab 5581-450X12, 4.50" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 114mm

Product Details The Flexfab 5581-450X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 787.49
$ 787.49 - $ 787.49
$ 787.49
$ 629.99
$ 629.99 - $ 629.99
$ 629.99
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 196.89
$ 196.89 - $ 196.89
$ 196.89
$ 157.49
$ 157.49 - $ 157.49
$ 157.49

Flexfab 5581-450, 4.50" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 114mm

Product Details The Flexfab 5581-450 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 196.89
$ 196.89 - $ 196.89
$ 196.89
$ 157.49
$ 157.49 - $ 157.49
$ 157.49
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 672.39
$ 672.39 - $ 672.39
$ 672.39
$ 537.89
$ 537.89 - $ 537.89
$ 537.89

Flexfab 5581-400X12, 4.00" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 102mm

Product Details The Flexfab 5581-400X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 672.39
$ 672.39 - $ 672.39
$ 672.39
$ 537.89
$ 537.89 - $ 537.89
$ 537.89
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 168.09
$ 168.09 - $ 168.09
$ 168.09
$ 134.49
$ 134.49 - $ 134.49
$ 134.49

Flexfab 5581-400, 4.00" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 102mm

Product Details The Flexfab 5581-400 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 168.09
$ 168.09 - $ 168.09
$ 168.09
$ 134.49
$ 134.49 - $ 134.49
$ 134.49
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 665.29
$ 665.29 - $ 665.29
$ 665.29
$ 532.19
$ 532.19 - $ 532.19
$ 532.19

Flexfab 5581-375X12, 3.75" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 95mm

Product Details The Flexfab 5581-375X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 665.29
$ 665.29 - $ 665.29
$ 665.29
$ 532.19
$ 532.19 - $ 532.19
$ 532.19
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 166.29
$ 166.29 - $ 166.29
$ 166.29
$ 133.09
$ 133.09 - $ 133.09
$ 133.09

Flexfab 5581-375, 3.75" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 95mm

Product Details The Flexfab 5581-375 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 166.29
$ 166.29 - $ 166.29
$ 166.29
$ 133.09
$ 133.09 - $ 133.09
$ 133.09
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 661.89
$ 661.89 - $ 661.89
$ 661.89
$ 529.49
$ 529.49 - $ 529.49
$ 529.49

Flexfab 5581-350X12, 3.50" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 89mm

Product Details The Flexfab 5581-350X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 661.89
$ 661.89 - $ 661.89
$ 661.89
$ 529.49
$ 529.49 - $ 529.49
$ 529.49
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 165.49
$ 165.49 - $ 165.49
$ 165.49
$ 132.39
$ 132.39 - $ 132.39
$ 132.39

Flexfab 5581-350, 3.50" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 89mm

Product Details The Flexfab 5581-350 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 165.49
$ 165.49 - $ 165.49
$ 165.49
$ 132.39
$ 132.39 - $ 132.39
$ 132.39
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 560.49
$ 560.49 - $ 560.49
$ 560.49
$ 448.39
$ 448.39 - $ 448.39
$ 448.39

Flexfab 5581-338X12, 3.38" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 86mm

Product Details The Flexfab 5581-338X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 560.49
$ 560.49 - $ 560.49
$ 560.49
$ 448.39
$ 448.39 - $ 448.39
$ 448.39
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 140.09
$ 140.09 - $ 140.09
$ 140.09
$ 112.09
$ 112.09 - $ 112.09
$ 112.09

Flexfab 5581-338, 3.38" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 86mm

Product Details The Flexfab 5581-338 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 140.09
$ 140.09 - $ 140.09
$ 140.09
$ 112.09
$ 112.09 - $ 112.09
$ 112.09
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 599.59
$ 599.59 - $ 599.59
$ 599.59
$ 479.69
$ 479.69 - $ 479.69
$ 479.69

Flexfab 5581-325X12, 3.25" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 83mm

Product Details The Flexfab 5581-325X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 599.59
$ 599.59 - $ 599.59
$ 599.59
$ 479.69
$ 479.69 - $ 479.69
$ 479.69
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 149.89
$ 149.89 - $ 149.89
$ 149.89
$ 119.89
$ 119.89 - $ 119.89
$ 119.89

Flexfab 5581-325, 3.25" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 83mm

Product Details The Flexfab 5581-325 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 149.89
$ 149.89 - $ 149.89
$ 149.89
$ 119.89
$ 119.89 - $ 119.89
$ 119.89
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 468.09
$ 468.09 - $ 468.09
$ 468.09
$ 374.49
$ 374.49 - $ 374.49
$ 374.49

Flexfab 5581-312X12, 3.13" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 80mm

Product Details The Flexfab 5581-312X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 468.09
$ 468.09 - $ 468.09
$ 468.09
$ 374.49
$ 374.49 - $ 374.49
$ 374.49
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 580.49
$ 580.49 - $ 580.49
$ 580.49
$ 464.39
$ 464.39 - $ 464.39
$ 464.39

Flexfab 5581-300X12, 3.00" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 76mm

Product Details The Flexfab 5581-300X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 580.49
$ 580.49 - $ 580.49
$ 580.49
$ 464.39
$ 464.39 - $ 464.39
$ 464.39
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 145.09
$ 145.09 - $ 145.09
$ 145.09
$ 116.09
$ 116.09 - $ 116.09
$ 116.09

Flexfab 5581-300, 3.00" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 76mm

Product Details The Flexfab 5581-300 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 145.09
$ 145.09 - $ 145.09
$ 145.09
$ 116.09
$ 116.09 - $ 116.09
$ 116.09
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 489.49
$ 489.49 - $ 489.49
$ 489.49
$ 391.59
$ 391.59 - $ 391.59
$ 391.59

Flexfab 5581-287X12, 2.88" x 12 ft, 4-Ply Blue Silicone Coolant Hose, 73mm

Product Details The Flexfab 5581-287X12 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It r...

View full details
$ 489.49
$ 489.49 - $ 489.49
$ 489.49
$ 391.59
$ 391.59 - $ 391.59
$ 391.59
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 122.39
$ 122.39 - $ 122.39
$ 122.39
$ 97.89
$ 97.89 - $ 97.89
$ 97.89

Flexfab 5581-287, 2.88" x 3 ft, 4-Ply Blue Silicone Coolant Hose, 73mm

Product Details The Flexfab 5581-287 is a silicone hose w/ 4-ply polyester reinforcement hose engineered for demanding engine environments. It resi...

View full details
$ 122.39
$ 122.39 - $ 122.39
$ 122.39
$ 97.89
$ 97.89 - $ 97.89
$ 97.89
Save 20% Save %

Request a Quote

Bulk and dealer pricing. Tell us what you need and we’ll reply within one business day.