FEL-PRO SX-4665 Exhaust Pipe Flange Gasket I2500 3.8L 4.1L L6

( Brand: Fel-pro ), ( Placement On Vehicle: Exhaust Gaskets Sealing Systems ), ( Type: Exhaust Pipe Flange Gasket ), ( Manufacturer Part Number: SX-4665 ), ( Item Length: 6.000 ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C746 78-44 ), ( Compatible Model: I2500 ), ( Compatible Year: 1966 1965 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Fel-pro Exhaust Pipe Flange Gasket )

Review FEL PRO Exhaust Pipe Flange Gasket Gmc 3.8l 4.1l L6 Sm fits 1965–1966

Fel-Pro SX-4665 Exhaust Pipe Flange Gasket for 1965-1966 GMC I2500 3.8L 4.1L L6 SM

The Fel-Pro SX-4665 exhaust pipe flange gasket is a high-performance replacement gasket designed specifically for the exhaust system of 1965-1966 GMC I2500 trucks equipped with the 3.8L 4.1L L6 SM engine. This gasket is a crucial component that seals the connection between the exhaust manifold and the exhaust pipe, ensuring a proper seal and minimizing exhaust leaks.

The Fel-Pro SX-4665 exhaust pipe flange gasket is made from a superior material, ensuring excellent sealing performance and longevity. It features a high-temperature, heat-resistant composite material that can withstand the extreme temperatures generated by the exhaust system, preventing warping, shrinking, or melting. This material also provides excellent resistance to oil, coolant, and other harsh chemicals that may be present in the exhaust gases.

The Fel-Pro SX-4665 exhaust pipe flange gasket is precision-engineered to fit perfectly in the exhaust system of the specified GMC trucks. Its contoured shape and size ensure a snug fit and proper sealing, preventing exhaust leaks and reducing the risk of engine damage caused by exhaust gases escaping into the engine compartment.

Installation of the Fel-Pro SX-4665 exhaust pipe flange gasket is straightforward and can be completed in a short time with basic hand tools. The gasket comes in a convenient, easy-to-handle size and shape, making it easy to position and seal in place.

In summary, the Fel-Pro SX-4665 exhaust pipe flange gasket is a high-quality, high-performance replacement gasket designed for the exhaust system of 1965-1966 GMC I2500 trucks. Its superior material, precise fit, and easy installation make it an excellent choice for anyone looking to maintain or upgrade the exhaust system on their GMC truck.

The Fel-Pro SX-4665 exhaust pipe flange gasket is a replacement part designed for 1965-1966 GMC I2500 trucks with the 3.8L 4.1L L6 SM engine. This gasket helps seal the connection between the exhaust manifold and the exhaust pipe. Here are some pros and cons of buying this gasket:

1. OEM Quality: The Fel-Pro SX-4665 gasket is manufactured to meet or exceed original equipment specifications.

2. Leak Prevention: A worn-out or damaged exhaust gasket can lead to exhaust leaks, which can negatively impact engine performance and increase emission levels. This new gasket can help prevent such leaks.

3. Easy Installation: The gasket comes with a rubber coating on the exhaust pipe side, making installation easier and reducing the likelihood of damaging the exhaust pipe.

4. Affordable: Compared to the cost of a new exhaust system, the Fel-Pro SX-4665 gasket is an affordable solution for fixing exhaust leaks.

1. May require other gaskets: In some cases, replacing the exhaust manifold gasket may also require replacing other gaskets, such as the head gasket or cylinder head gasket, which can add to the overall cost.

2. Potential for gasket failure: While the Fel-Pro SX-4665 gasket is designed to last, it is still a rubber gasket and can potentially fail over time due to extreme temperatures and exhaust gas pressures.

3. May not be a direct fit: While the Fel-Pro SX-4665 gasket is designed to fit 1965-1966 GMC I2500 trucks, it is essential to double-check the compatibility with your specific vehicle before purchasing.

The Fel-Pro SX-4665 exhaust pipe flange gasket can be a cost-effective solution for fixing exhaust leaks on 1965-1966 GMC I2500 trucks. Its OEM quality and easy installation make it an attractive option for DIY enthusiasts. However, it is essential to consider the potential need for other gasket replacements and the potential for gasket failure over time. Ultimately, if you suspect an exhaust leak, the Fel-Pro SX-4665 gasket is worth considering as a potential solution.

If you are experiencing exhaust leaks on your 1965-1966 GMC I2500 truck, the Fel-Pro SX-4665 exhaust pipe flange gasket is a viable option for repair. It is essential to ensure compatibility with your specific vehicle and consider the potential need for other gasket replacements. Additionally, regular maintenance and inspection of the exhaust system can help prevent future exhaust leaks and prolong the life of the gasket.

part # sx4665 prices

• $11.29-$26.19

specifications gasketdug:

• for makes: Gmc
• for years: 1965-1966
• brand: Fel-pro
• placement on vehicle: Exhaust Gaskets Sealing Systems
• type: Exhaust Pipe Flange Gasket
• manufacturer part number: SX-4665
• item length: 6.000
• manufacturer warranty: 1 Year
• interchange part number: C746 78-44
• compatible model: I2500
• compatible year: 1966 1965
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Fel-pro Exhaust Pipe Flange Gasket

offer gasketdug:

• availability: In Stock
• quantity: 9
• sold: 0
• started: November 13, 2025
• options: Ship-to-home

shipping gasketdug:

• type: Fixed
• cost: $0.00
• class: Standard, Expedited
• service: Standard, Expedited
• transit: 2-5 Days

payments gasketdug:

• other
• wallet: Google-pay
• credit card: Visa

seller gasketdug:

• rating: 99.2%
• # reviews: 592440

general gasketdug:

• condition: New
• Car Truck Parts Accessories > Exhaust Emission Systems > Exhaust Gaskets

returns gasketdug:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

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