Heater Core
Hover over the image to zoom in
Share this:

CARQUEST Heater Core

Part No. 399300 Warranty Details  
Quantity  Add to Cart

See if this part fits a specific vehicle.

Check Vehicle Fit

All heater cores are designed and tested to match or exceed OE specifications for form, fit and performance with a clear focus on obtaining the highest heat transfer performance possible through use of quality materials and manufacturing processes to ensure optimal heating.
Back To Top
Core Height:7 3/8 in
Core Material:Aluminum
Depth:2 in
Inlet Connection Type:3/4 in. Quick Connect
Inlet Diameter:3/4 Quick Connect in
Outlet Connection Type:3/4 in. Quick Connect
Outlet Diameter:3/4 Quick Connect in
Tank Material:Aluminum
Thickness:1 in
Width:7 1/4 in

Do you have questions about this product?


Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

1 Question | 2 Answers
Displaying question 1
  • Q:

    this fits 2003 6.0 diesel ? how do i start getting the old one out ?
    Asked on 10/30/2012 by trapper from sussex county , va.

    2 answers



      For further assistance regarding Ready-Aire Heater Core - Part No. 399300, please provide the year, make, model and engine size of your vehicle. This information would help us to assist you in a better way.
      For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

      Answered on 10/30/2012 by Aaron from AAP
    • A:

      You-tube video shows you.

      Answered on 11/19/2014 by Jesse from Roanoke, VA
Displaying question 1

Do you have a question about this product? 

Check out the specials in our monthly flyer.
Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.