Heater Box Assembly 3-Speed 1965-1966

CJ's Part Number: HBA2

Regular Price: $228.99

Special Price: $206.09

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The items below will help you with your heater box assembly install.

Regular Price: $73.99

Special Price: $62.89


Regular Price: $20.99

Special Price: $14.69

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HBA2 HBA2_1 HBA2_2 HBA2_3 HBA2_4 HBA2_5 HBA2_6 Play Heater Box Assembly 3-Speed 1965-1966 Video 1

Product Description

Heater Box Assembly for all 1965-1966 Mustangs with a 3-speed heater motor.

Replace your damaged factory original or missing heater box assembly. This heater box assembly consist of a front and rear fiberglass casing with access doors just like the original unit. This factory style box is a direct replacement for all 1965-1966 Mustangs. The two piece design allows for easy access to install the heater core and inspect the working internals.

Kit Includes:
- Heater Box Gaskets
- Heater Box Seals
- Heater Housing Clips

Please Note: This Heater Box Assembly does NOT include the heater motor or the heater resistor.

The heater plenum attaches to this assembly and directs warm air throughout your Mustang. With this being a replacement unit all the factory correct mounting brackets are pre-installed letting you know everything will line up. This heater box assembly also features pre-cut holes for the heater core and heater resistor.

When it gets cold, how effective is the heat in your classic Mustang? If that question was answered with, 'no,' CJ Pony Parts has several hundred heating parts that can help get these important components of your Mustang working again, ready for the cold seasons each year.

Purchase your Heater Box Assembly for all 1965-1966 Mustangs with a 3-speed heater motor from CJ Pony Parts today!

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Installation Instructions


Difficulty: Moderate

Mustang Applications

This product will fit the following Ford Mustang years:

Product Reviews

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Heater Box Assembly 3-Speed 1965-1966 is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from strong and great fit everything goes together easy, nice fit in the car.
Date published: 2015-01-08
  • 2015-03-26T10:05CST
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Product Questions


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Product Video

By Bill Tumas: We’re here with a replacement heater box assembly for your 1965 through 1966 Mustang. This heater box assembly comes ready to install in your '65 through '66 Mustang with three speed heater. All of your seals are already in place, as well as a resistor for the three speed heater. It includes the bracket, as well as the seals for your heater core. It comes with all necessary hardware to mount to your fire wall and to your heater motor. This heater box assembly is the perfect choice for replacing the damaged original heater box on your '65 through '66 Mustang.