The 1957-2002 GM Car & Truck 2.5" Exhaust Pipe Donut / Seal is a high-temperature gasket designed to ensure a tight, leak-proof connection between exhaust pipe flanges in classic and modern GM vehicles. Perfect for ball-and-socket or flange-style connections, this exhaust seal absorbs heat and vibration while maintaining proper backpressure and exhaust flow. Built from high-quality, heat-resistant materials, it fits 2.5-inch diameter exhaust systems and is ideal for both restoration and custom applications.
Installation:
Difficulty: 2/5 – Requires basic tools and access to exhaust flange connections.
Instructions: Remove the old donut or seal and clean the flange surfaces thoroughly. Insert the new donut between the exhaust flanges or into the ball joint. Reassemble and tighten bolts evenly to compress the seal and ensure a snug fit. Start the engine and inspect for any leaks or rattles, adjusting as necessary.
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| Make | Model | Years |
| Chevrolet | Chevy II | 1962 - 1968 |
| Chevrolet | Nova | 1969 - 1988 |
