OE Quality
60-Day Returns

Dynomax 36491 Exhaust Pipe Flange Gasket
Durable Exhaust Pipe Flange Gasket for Chevrolet and GMC Trucks
The Dynomax 36491 exhaust pipe flange gasket is designed to provide a reliable seal for exhaust systems on Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD models. Engineered with a graphoil composite material, this gasket ensures durability and effective sealing under high-temperature conditions.
- Compatible with Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD
- Constructed from premium graphoil composite material
- 3-bolt style with 5.844 inch bolt hole center-to-center spacing
- Port dimensions: 4.5 inches length and width for optimal fit
- Thickness of 0.063 inches for secure sealing
- Product grade: Premium for enhanced performance
Technical Specifications and Features
The Dynomax 36491 exhaust pipe flange gasket features a 3-bolt design with a bolt hole center-to-center measurement of 5.844 inches, ensuring precise alignment with exhaust flanges on compatible trucks. The gasket’s port measures 4.5 inches in both length and width, matching the exhaust pipe flange dimensions for a tight seal. Made from a graphoil composite, this gasket withstands high temperatures and resists exhaust gas leakage. With a thickness of 0.063 inches, it provides a balance between flexibility and durability, maintaining a secure seal over time.
Applications and Problem Solving
- Prevents exhaust leaks between pipe flanges on Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD
- Reduces noise caused by escaping exhaust gases
- Helps maintain proper exhaust system backpressure for engine efficiency
- Protects against corrosion and gasket degradation in high-heat environments
- Ensures compliance with emissions standards by preventing leaks
Installation Notes and Tips
When installing the Dynomax 36491 exhaust pipe flange gasket, ensure that the mating surfaces are clean and free of debris or old gasket material. Align the gasket carefully with the 3-bolt flange holes, matching the 5.844 inch bolt hole center-to-center spacing. Tighten bolts evenly in a crisscross pattern to avoid warping the flange and to achieve an even seal. It is recommended to inspect the gasket periodically for signs of wear or damage, especially after extended use in harsh conditions.
Quality Assurance and Warranty
Dynomax exhaust gaskets are manufactured to meet stringent quality standards, using premium materials like graphoil composite for durability and heat resistance. The 36491 gasket is designed to provide consistent performance in demanding exhaust applications. While specific warranty details are not provided, Dynomax products typically adhere to industry standards for reliability and fitment, ensuring compatibility with Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD exhaust systems.
| Brand | Dynomax |
| Part Number | 36491 |
| Bolt Hole Center To Center 1 | 5.844 in. |
| Class | PW |
| Material | Graphoil Composite |
| Port 1 Length | 4.500 in. |
| Port 1 Width | 4.500 in. |
| Product Grade | Premium |
| Style | 3 Bolt |
| Thickness | 0.063 in. |
| Total Part VIO | 0 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | DPF Back System |
| 2010 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | DPF Back System |
| 2009 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | DPF Back System |
| 2009 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | DPF Back System |
| 2008 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | DPF Back System |
| 2008 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | DPF Back System |
| 2007 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | DPF Back System |
| 2007 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | DPF Back System |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.