Flex Radiator Hose, Standard
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CARQUEST by Dayco Flex Radiator Hose, Standard

Part No. 81151 Warranty Details  
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Precision molded in standard lengths, CARQUEST by Dayco® Flex Radiator Hose is designed to replace straight or molded radiator hoses. This Flex Radiator Hose is another CARQUEST by Dayco® product proudly made in the USA. Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:
  • The knitted reinforcement and synthetic EPDM construction meets SAE J20R4, Class D-2 requirements
  • Resists ozone and other detrimental environmental elements, coolants, and temperature variations of -40°F (-40°C) to +257°F (+125°C)
  • The corrugations provide excellent hose flexibility without flattening or collapse
  • This hose is designed to prevent splitting, ballooning, and elongation
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End 1 Inside Diameter:1 1/2 in
End 2 Inside Diameter:1 1/2 in
Heat Shield:N
Hose Type:Single I.D. Hose
Protective Sleeve Attached:N
SAE Approved:SAE J20R4 Class D-2


by PowerReviews
CARQUEST by DaycoFlex Radiator Hose, Standard

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 1 Stars



Reviewed by 2 customers

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(3 of 5 customers found this review helpful)


Radiator hose for 69 Mustang


from Maine

See all my reviews

3 or more reviews submitted


  • Durable


    Best Uses

    • Everyday Driving
    • Replacement
    • Restoration

    Comments about CARQUEST by Dayco Flex Radiator Hose, Standard:

    This hose fits for my upper radiator hose on my 69 mustang. Went a little tough but not too bad. It's a really stiff hose, with decent thickness and it has in interior spring. Tough to bend but once you got everything lined up, it will be a really solid radiator hose. Definitely wet the inside of the hose lips which will be sliding over the pipes, it will help it to slide on slightly easier. You could probably beat someone up with this hose! Kidding, don't do that!

    • Car & Truck:
    • Auto Enthusiast, Mechanic, Truck Enthusiast

    (3 of 6 customers found this review helpful)




    from Newark, OH

    Comments about CARQUEST by Dayco Flex Radiator Hose, Standard:

    This was given to me for a 65 mustang lower radiator hose. Went on no problem, the length was good. But the curvature was impossible and caused this to collapse and made the car overheat. The spring inside didnt help...

    • Car & Truck:
    • Auto Enthusiast, Casual Driver, Mechanic

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    1 Question | 1 Answer
    Displaying question 1
    • Q:

      looking for a shorter flex hose with 1.750 id and 1.5 id
      Asked on 9/14/2011 by Anonymous

      1 answer



        The inside diameter of this hose is 1.5 inches.

        Answered on 9/14/2011 by Dennis from AAP
    Displaying question 1

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