CJ Classics Heater Seal Kit 1965-1966/Without Air Conditioning 1967-1968

CJ's Part Number:
94% of 100


  • Direct-Fit Replacement
  • Complete Kit (15 Piece)
  • Easy Installation
  • Fits 1965-1968 Mustang
MSRP $18.83
You save 18%

CJ Classics Heater Seal Kit for all 1965-1966 Mustangs and 1967-1968 Mustangs without Air Conditioning.

When you're replacing or rebuilding the heater box assembly in your 1965-1966 Mustang or your 1967-1968 Mustang without air conditioning, it's a good idea to install new heater seals too. This CJ Classics Heater Seal Kit has everything you need to replace those old, broken-down original seals. You and your passengers will enjoy a much warmer ride after you put these seals in!

Features and Benefits:
- Complete Kit with Everything You'll Need to Replace the Original Seals
- Fifteen (15) Pieces Total
- Works on All 1965-1966 Mustangs and on 1967-1968 Mustangs Without Air Conditioning
- Will Keep Air from Escaping from Your Heater Box Assembly
- Helps Your Heater Function and Warm Up Your Mustang's Interior Better
- Direct Fit Replacements that Easily Install in the Factory Locations

This Heater Seal Kit is just what you need to keep air from escaping from your heater box assembly. Why go through all of the trouble of rebuilding or replacing your heater box assembly if warm air is going to escape and not reach you and your passengers? Chances are, those old seals that are currently in your Mustang are cracked and broken down. Replace them with the seals from this kit, and you'll notice a big difference in how warm the interior of your vintage Pony gets when you have the heat running.

You'll get 15 pieces total: everything you need to replace all of the old seals. They are all direct fit replacements that easily install in the factory locations. All you'll need is a spray-on adhesive or a weatherstrip adhesive, and you'll find these seals are incredibly easy to put in.

Please Note: This Heater Seal Kit will work on all 1965-1966 Mustangs, but it'll only work on 1967-1968 Mustangs that do NOT have air conditioning. For a Heater Seal Kit for 1967-1968 Mustangs with air conditioning, please see HSK2.

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Video Transcript

We're here with a heater seal kit, fitting 1964 through 1968 Mustangs. This 15-piece seal kit gives you everything necessary to reseal the heater box in your 1964 through 1968 Mustang. It will fit '64 through '66 with or without factory air conditioning, and will fit '67 through '68 without factory air conditioning. The only difference between the two kits is this seal here is for your '64 through '66 , while this one here will fit your '67 through '68. Whether you're replacing a heater plenum or rebuilding your original heater box, make sure you pick up one of our heater seal kits to make the system work properly.

Vehicle Fitment

This product will fit the following Mustang years:

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