Skip to content

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 %
$ 2,016.00
$ 2,016.00 - $ 2,016.00
$ 2,016.00
$ 1,613.00
$ 1,613.00 - $ 1,613.00
$ 1,613.00

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
$ 2,016.00
$ 2,016.00 - $ 2,016.00
$ 2,016.00
$ 1,613.00
$ 1,613.00 - $ 1,613.00
$ 1,613.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant Save 20% Save %
$ 1,663.00
$ 1,663.00 - $ 1,663.00
$ 1,663.00
$ 1,330.00
$ 1,330.00 - $ 1,330.00
$ 1,330.00

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
$ 1,663.00
$ 1,663.00 - $ 1,663.00
$ 1,663.00
$ 1,330.00
$ 1,330.00 - $ 1,330.00
$ 1,330.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant Save 20% Save %
$ 1,399.00
$ 1,399.00 - $ 1,399.00
$ 1,399.00
$ 1,120.00
$ 1,120.00 - $ 1,120.00
$ 1,120.00

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
$ 1,399.00
$ 1,399.00 - $ 1,399.00
$ 1,399.00
$ 1,120.00
$ 1,120.00 - $ 1,120.00
$ 1,120.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant Save 20% Save %
$ 15,616.00
$ 15,616.00 - $ 15,616.00
$ 15,616.00
$ 12,492.00
$ 12,492.00 - $ 12,492.00
$ 12,492.00

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
$ 15,616.00
$ 15,616.00 - $ 15,616.00
$ 15,616.00
$ 12,492.00
$ 12,492.00 - $ 12,492.00
$ 12,492.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 3,904.00
$ 3,904.00 - $ 3,904.00
$ 3,904.00
$ 3,124.00
$ 3,124.00 - $ 3,124.00
$ 3,124.00

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
$ 3,904.00
$ 3,904.00 - $ 3,904.00
$ 3,904.00
$ 3,124.00
$ 3,124.00 - $ 3,124.00
$ 3,124.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 14,744.00
$ 14,744.00 - $ 14,744.00
$ 14,744.00
$ 11,794.00
$ 11,794.00 - $ 11,794.00
$ 11,794.00

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
$ 14,744.00
$ 14,744.00 - $ 14,744.00
$ 14,744.00
$ 11,794.00
$ 11,794.00 - $ 11,794.00
$ 11,794.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 3,685.00
$ 3,685.00 - $ 3,685.00
$ 3,685.00
$ 2,950.00
$ 2,950.00 - $ 2,950.00
$ 2,950.00

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
$ 3,685.00
$ 3,685.00 - $ 3,685.00
$ 3,685.00
$ 2,950.00
$ 2,950.00 - $ 2,950.00
$ 2,950.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 13,567.00
$ 13,567.00 - $ 13,567.00
$ 13,567.00
$ 10,854.00
$ 10,854.00 - $ 10,854.00
$ 10,854.00

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
$ 13,567.00
$ 13,567.00 - $ 13,567.00
$ 13,567.00
$ 10,854.00
$ 10,854.00 - $ 10,854.00
$ 10,854.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 3,392.00
$ 3,392.00 - $ 3,392.00
$ 3,392.00
$ 2,714.00
$ 2,714.00 - $ 2,714.00
$ 2,714.00

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
$ 3,392.00
$ 3,392.00 - $ 3,392.00
$ 3,392.00
$ 2,714.00
$ 2,714.00 - $ 2,714.00
$ 2,714.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 11,584.00
$ 11,584.00 - $ 11,584.00
$ 11,584.00
$ 9,267.00
$ 9,267.00 - $ 9,267.00
$ 9,267.00

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
$ 11,584.00
$ 11,584.00 - $ 11,584.00
$ 11,584.00
$ 9,267.00
$ 9,267.00 - $ 9,267.00
$ 9,267.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 2,896.00
$ 2,896.00 - $ 2,896.00
$ 2,896.00
$ 2,317.00
$ 2,317.00 - $ 2,317.00
$ 2,317.00

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
$ 2,896.00
$ 2,896.00 - $ 2,896.00
$ 2,896.00
$ 2,317.00
$ 2,317.00 - $ 2,317.00
$ 2,317.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 11,462.00
$ 11,462.00 - $ 11,462.00
$ 11,462.00
$ 9,169.00
$ 9,169.00 - $ 9,169.00
$ 9,169.00

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
$ 11,462.00
$ 11,462.00 - $ 11,462.00
$ 11,462.00
$ 9,169.00
$ 9,169.00 - $ 9,169.00
$ 9,169.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 2,865.00
$ 2,865.00 - $ 2,865.00
$ 2,865.00
$ 2,293.00
$ 2,293.00 - $ 2,293.00
$ 2,293.00

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
$ 2,865.00
$ 2,865.00 - $ 2,865.00
$ 2,865.00
$ 2,293.00
$ 2,293.00 - $ 2,293.00
$ 2,293.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 11,403.00
$ 11,403.00 - $ 11,403.00
$ 11,403.00
$ 9,122.00
$ 9,122.00 - $ 9,122.00
$ 9,122.00

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
$ 11,403.00
$ 11,403.00 - $ 11,403.00
$ 11,403.00
$ 9,122.00
$ 9,122.00 - $ 9,122.00
$ 9,122.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 2,852.00
$ 2,852.00 - $ 2,852.00
$ 2,852.00
$ 2,281.00
$ 2,281.00 - $ 2,281.00
$ 2,281.00

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
$ 2,852.00
$ 2,852.00 - $ 2,852.00
$ 2,852.00
$ 2,281.00
$ 2,281.00 - $ 2,281.00
$ 2,281.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 9,656.00
$ 9,656.00 - $ 9,656.00
$ 9,656.00
$ 7,725.00
$ 7,725.00 - $ 7,725.00
$ 7,725.00

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
$ 9,656.00
$ 9,656.00 - $ 9,656.00
$ 9,656.00
$ 7,725.00
$ 7,725.00 - $ 7,725.00
$ 7,725.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 2,414.00
$ 2,414.00 - $ 2,414.00
$ 2,414.00
$ 1,932.00
$ 1,932.00 - $ 1,932.00
$ 1,932.00

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
$ 2,414.00
$ 2,414.00 - $ 2,414.00
$ 2,414.00
$ 1,932.00
$ 1,932.00 - $ 1,932.00
$ 1,932.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 10,330.00
$ 10,330.00 - $ 10,330.00
$ 10,330.00
$ 8,264.00
$ 8,264.00 - $ 8,264.00
$ 8,264.00

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
$ 10,330.00
$ 10,330.00 - $ 10,330.00
$ 10,330.00
$ 8,264.00
$ 8,264.00 - $ 8,264.00
$ 8,264.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 2,583.00
$ 2,583.00 - $ 2,583.00
$ 2,583.00
$ 2,066.00
$ 2,066.00 - $ 2,066.00
$ 2,066.00

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
$ 2,583.00
$ 2,583.00 - $ 2,583.00
$ 2,583.00
$ 2,066.00
$ 2,066.00 - $ 2,066.00
$ 2,066.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 8,065.00
$ 8,065.00 - $ 8,065.00
$ 8,065.00
$ 6,452.00
$ 6,452.00 - $ 6,452.00
$ 6,452.00

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
$ 8,065.00
$ 8,065.00 - $ 8,065.00
$ 8,065.00
$ 6,452.00
$ 6,452.00 - $ 6,452.00
$ 6,452.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 10,001.00
$ 10,001.00 - $ 10,001.00
$ 10,001.00
$ 8,001.00
$ 8,001.00 - $ 8,001.00
$ 8,001.00

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
$ 10,001.00
$ 10,001.00 - $ 10,001.00
$ 10,001.00
$ 8,001.00
$ 8,001.00 - $ 8,001.00
$ 8,001.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 2,500.00
$ 2,500.00 - $ 2,500.00
$ 2,500.00
$ 2,000.00
$ 2,000.00 - $ 2,000.00
$ 2,000.00

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
$ 2,500.00
$ 2,500.00 - $ 2,500.00
$ 2,500.00
$ 2,000.00
$ 2,000.00 - $ 2,000.00
$ 2,000.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 8,433.00
$ 8,433.00 - $ 8,433.00
$ 8,433.00
$ 6,747.00
$ 6,747.00 - $ 6,747.00
$ 6,747.00

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
$ 8,433.00
$ 8,433.00 - $ 8,433.00
$ 8,433.00
$ 6,747.00
$ 6,747.00 - $ 6,747.00
$ 6,747.00
Save 20% Save %
Flexfab 5526-062x50, 5/8" ID x 50 ft Box Blue Silicone Heater Hose, 16mm 350F Radiator Coolant
Save 20% Save %
$ 2,109.00
$ 2,109.00 - $ 2,109.00
$ 2,109.00
$ 1,687.00
$ 1,687.00 - $ 1,687.00
$ 1,687.00

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
$ 2,109.00
$ 2,109.00 - $ 2,109.00
$ 2,109.00
$ 1,687.00
$ 1,687.00 - $ 1,687.00
$ 1,687.00
Save 20% Save %

Request a Quote

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