Replace the inner gas cap on your 1967-1973 Ford Mustang equipped with a pop-open style gas cap cover using this vented replacement cap. Designed for pop-open fuel cap applications, this inner cap restores the internal fuel filler closure while maintaining the correct vented configuration for compatible vehicles.
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Pop-open fuel cap application: Replacement inner cap for cars with the pop-open style gas cap cover.
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Vented design: Built as a vented inner gas cap for compatible fuel filler applications.
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Important emissions note: Not to be used with evaporative emission equipped cars from 1970 and newer.
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Fuel filler closure: Helps complete the fuel filler opening behind the pop-open exterior gas cap cover.
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Restoration purpose: Replaces a worn, damaged, incorrect, or missing inner gas cap.
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Package dimensions: 3 in. L x 3 in. W x 1.5 in. H.
This inner gas cap installs behind the exterior pop-open gas cap cover and serves as the functional fuel filler cap. Its vented design supports the correct cap style for compatible 1967-1973 Mustang fuel systems that use a pop-open cover.
A worn, damaged, incorrect, or missing inner cap can leave the fuel filler area incomplete and may prevent the fuel cap assembly from functioning as intended. Because this is a vented cap, it should not be used on 1970 and newer cars equipped with evaporative emissions.
Complete the pop-open fuel cap assembly on your 1967-1973 Mustang with this vented inner gas cap for compatible applications.
| Product Fitment |
| Make |
Ford |
| Model |
Mustang |
| Year Range |
1967-1973 |
| Fuel Cap Style |
Pop-open style gas cap cover |
| Cap Type |
Vented |
| Emissions Note |
Not to be used with evaporative emission equipped cars 1970 and newer |
| Installation Location |
Fuel filler opening behind pop-open gas cap cover |
| Application |
Inner gas cap replacement, pop-open fuel cap service, fuel filler closure repair, or complete Mustang fuel cap restoration |
| Product Specs |
| Product Type |
Inner Gas Cap for Pop-Open Fuel Caps |
| Quantity |
1 |
| Cap Type |
Vented |
| Fuel Cap Style |
For pop-open style gas cap cover |
| Mounting Location |
Fuel filler opening |
| Function |
Provides the functional inner fuel filler cap behind the pop-open cover |
| Important Note |
Not for evaporative emission equipped cars 1970 and newer |
| Replacement Use |
Replaces a worn, damaged, incorrect, or missing inner gas cap |
| Package Dimensions |
3 in. L x 3 in. W x 1.5 in. H |
| Approximate Weight |
0.2 lb. |
