Fel-Pro engine oil pan gasket set for Ford Mustang OS 13260 T — cork-rubber seal kit for classic Shelby/AC applications

Fel-Pro OS 13260 T is a complete engine oil pan gasket set built from a cork-rubber compound to reseal oil pans and accommodate imperfect mating surfaces.

If your Mustang or compatible classic vehicle is showing oil seepage around the oil pan, this gasket set supplies the parts and material designed for repair environments. Fel-Pro engineered the OS 13260 T set to conform to worn or uneven flange surfaces and to simplify reassembly by including the components typically required for a proper oil pan replacement.

What vehicles and engines will this oil pan gasket fit?

This set is intended for a range of classic cars and Shelby/AC applications listed by Fel-Pro. Always verify fitment against your year, make, model, engine and trim before ordering to ensure correct compatibility.

• Common fits include select 1960s Shelby and AC Cobra applications and other classic models specified by the manufacturer.
• Also listed for several 1970s and 1960s TVR models; check vehicle details for final confirmation.
• Use vendor fitment tools (year/make/model/engine) to confirm the OS 13260 T matches your vehicle.

How does the cork-rubber construction help sealing performance?

The proprietary cork-rubber blend is engineered to be flexible and compressible, which helps it create a tight seal even when the mating surfaces are not perfectly flat. This reduces leak paths and maintains sealing integrity under normal engine vibrations and torque cycles.

• Highly conformable material adapts to flange irregularities for improved contact.
• Compression characteristics maintain a consistent seal as bolts are torqued.
• Resistant to common engine oils and fluids encountered in service.

What is included in the Fel-Pro gasket set and why is that useful?

Fel-Pro supplies every part needed for an oil pan service unless otherwise noted, which helps avoid multiple trips for missing pieces. The set is curated for repair shops and DIYers to streamline installation and restore proper sealing quickly.

• Complete oil pan gasket(s) made from cork-rubber compound.
• Associated seals or smaller gaskets necessary for the specific application.
• Packaged as a repair-oriented kit to minimize missing components during disassembly.

How was the OS 13260 T validated for on-road performance?

Parts in this Fel-Pro series undergo real-world vehicle testing to validate fit and function. On-vehicle testing focuses on installation conditions common in service environments and evaluates sealing under actual driving conditions.

• Tested on vehicles to check for fitment and leak prevention under load.
• Validated to perform under typical engine vibration and thermal cycles.
• Manufactured to reproduce the original service fit where possible.

Who is this for: The Fel-Pro OS 13260 T oil pan gasket set is for mechanics and classic car owners restoring or maintaining Mustangs, Shelby/AC Cobras, and specified TVR models who need a reliable, conformable gasket solution. It suits repair shops and experienced DIYers who prefer a kit containing the parts commonly required for oil pan reseal jobs and who will verify vehicle fitment before purchase.