Catalytic Converter Gasket – 025-251-509

The 025-251-509 is a critical component for maintaining a quiet and efficient exhaust system. Because the catalytic converter is located near the engine where heat is most intense, these gaskets can become brittle and blow out over time. Replacing the gasket during any exhaust work is a standard best practice to avoid the "exhaust tick" associated with small leaks.

This gasket is highly versatile, covering everything from the compact VW Fox and Rabbit to the heavy-duty Vanagon and Porsche 924. Its robust design is meant to crush slightly upon installation, conforming to any minor imperfections in the exhaust flanges to create a gas-tight barrier.

Detailed Vehicle Compatibility

VW Vanagon:

1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 (1.9L & 2.1L)

VW Cabriolet:

1985, 1986, 1987, 1988, 1989

VW Fox:

1987, 1988, 1989, 1990, 1991, 1992, 1993 (Rear)

VW Jetta:

1983, 1984

VW Quantum:

1983, 1984, 1985 (1.7L & 1.8L Rear)

VW Rabbit:

1982, 1983, 1984 (1.7L Carb.)

VW Rabbit Convertible:

1983, 1984

VW Scirocco:

1983, 1984, 1985, 1986, 1987 (8v Models)

Porsche 924:

1980, 1981, 1982 (Base; Naturally Aspirated)

Product Highlights & Features

Multi-Layer Design: Engineered for maximum sealing capability under high pressure and thermal expansion.
Corrosion Protection: Materials are selected to resist the corrosive acidic byproducts of internal combustion and road salt exposure.
Standard Fitment: Designed for the 3-bolt flange configuration common on many 80s-era catalytic converters.

Technical Specifications

Part Number: 025-251-509 (Interchange: 025251509)
Configuration: 3-Bolt Flange Gasket
Material: Composite with Metal Reinforcement
Inside Diameter: Sized for standard 2-inch to 2.25-inch exhaust tubing

Installation & Maintenance Tips

Clean Flange Surfaces: Use a wire brush or scraper to remove all remnants of the old gasket and rust from the exhaust flanges before installing the new one.
Hardware Replacement: Because exhaust bolts often rust or snap during removal, it is highly recommended to use new Grade 8 or Stainless Steel bolts and nuts when installing this gasket.
Even Torque: Tighten the three flange bolts in a circular pattern to ensure the gasket is crushed evenly, providing a uniform seal around the entire circumference.

025251509

025-251-509 VW & Porsche Catalytic Converter Gasket - Vanagon, Jetta, Rabbit

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025-251-509 VW & Porsche Catalytic Converter Gasket - Vanagon, Jetta, Rabbit

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