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Header gaskets are crucial for sealing the exhaust system, preventing leaks that can lead to performance loss and increased emissions. Selecting the correct replacement gasket ensures optimal engine function and longevity. Investing in a quality gasket material can also contribute to a quieter, more efficient ride.
GET THE RIGHT PART -- Before purchasing, please check the “Amazon Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the...
Performance exhaust header gasket consisting of a high-density fiber facing material attached to both sides of a perforated steel core.
Inhibits blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets.
Nonstick coating permits motion without damaging the gasket and makes it easier to take off the gasket for future engine service.
Slotted bolt holes allow for easier header installation.
Not intended for use in emission controlled vehicles.
🔎 BUYING GUIDE: Distance between the two bolt holes of the flange gasket is 3.3"/ 84mm and fits 10mm bolts. Compatible with SBC, BBC, 302, 350, 454, and fits all 3 inch collector with triangle (3 Bolt Pattern). A good replacement to replace old or...
🔎 PREMIUM QUALITY COPPER: Our exhaust flange gasket is made of top quality copper material, more prominent wear resistance, pressure resistance and heat resistance, so that it can always maintain excellent performance. It is a reliable and durable car...
🔎 EFFECTIVE SEALING: The exhaust gasket is an elastic sealing gasket assembled between the pipe and the cylinder head exhaust port to prevent hot gases from diffusing outward from the connection, and utilizes a durable composite O-shape design with...
🔎 IMPROVE PERFORMANCE: Exhaust pipe flange gasket can better connect the pipe interface, reduce energy loss, but also help to reduce engine noise, so that the engine stably maintains an efficient working condition.
🔎 EASY INSTALLATION: Each of our bags comes with 2 header gaskets of the same size. The flange gaskets have 3 slotted bolt holes, simply place the heatsink on the port, align the piston holes, make sure the screw holes and bolt holes are lined up, and...
🔎 BUYING GUIDE: Distance between the two bolt holes of the flange gasket is 3"/ 76mm and fits 10mm bolts. Compatible with SBC, BBC, 302, 350, 454, and fits all 2.5 inch collector with triangle (3 Bolt Pattern). A good replacement to replace old or...
🔎 PREMIUM QUALITY COPPER: Our exhaust flange gasket is made of top quality copper material, more prominent wear resistance, pressure resistance and heat resistance, so that it can always maintain excellent performance. It is a reliable and durable car...
🔎 EFFECTIVE SEALING: The exhaust gasket is an elastic sealing gasket assembled between the pipe and the cylinder head exhaust port to prevent hot gases from diffusing outward from the connection, and utilizes a durable composite O-shape design with...
🔎 IMPROVE PERFORMANCE: Exhaust pipe flange gasket can better connect the pipe interface, reduce energy loss, but also help to reduce engine noise, so that the engine stably maintains an efficient working condition.
🔎 EASY INSTALLATION: Each of our bags comes with 2 header gaskets of the same size. The flange gaskets have 3 slotted bolt holes, simply place the heatsink on the port, align the piston holes, make sure the screw holes and bolt holes are lined up, and...
Heating and cooling of the exhaust system causes header and manifold flanges to warp resulting in gaps between the head and header which Remflex exhaust gaskets seal completely due to the thickness and compressibility of the 100 percent flexible graphite
Remflex exhaust gaskets come in a standard 1/8 inch thickness and are designed to crush 50 percent allowing them to fill any pits or gaps in the flange surface up to 1/16 inch
The aluminum cylinder head and steel header or manifold combination are configurations that readily cause gap issues in the mating flanges due to contraction and expansion of the dissimilar materials; Remflex exhaust gaskets fill those gaps permanently
There are no rubber binders or composite materials in Remflex exhaust gaskets so they will not shrink or harden due to time or temperature eliminating the need to go back and continually retighten your flange bolts
GET THE RIGHT PART -- Before purchasing, please check the “Amazon Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the...
Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function
Contains all gaskets and seals to take off and replace exhaust manifold
【Wide Compatibility】Compatible with SB Chevy 305 / 327 / 350 / 383 engines (Please pay attention to the length of the screws, especially for cylinder 327), supporting all 1955–1998/1999 Chevy Small Block exhaust headers with up to 1/2" thick...
【High-Quality Copper Gaskets】Precision-built Exhaust header collector gaskets provide superior sealing, heat resistance, and durability, preventing leaks and blowouts even in high-temperature exhaust environments.
【Premium Stainless Hardware Included】Includes 18-8 stainless steel 3/8-16×1" bolts and washers for exceptional corrosion resistance—unlike chrome or carbon steel bolts, these will not rust or seize.
【Complete Package】Comes with 2PCS copper collector gaskets + stainless bolts & washers, offering a full, ready-to-install solution for your exhaust header upgrade.
【Reliable After-Sales Support】Each product is thoroughly inspected before shipping. If you have any issues, simply provide your vehicle’s make, model, year, and photos—we respond promptly and will constantly improve our products.
Heating and cooling of the exhaust system causes header and manifold flanges to warp resulting in gaps between the head and header which Remflex exhaust gaskets seal completely due to the thickness and compressibility of the 100 percent flexible graphite
Remflex exhaust gaskets come in a standard 1/8 inch thickness and are designed to crush 50 percent allowing them to fill any pits or gaps in the flange surface up to 1/16 inch
There are no rubber binders or composite materials in Remflex exhaust gaskets so they will not shrink or harden due to time or temperature eliminating the need to go back and continually retighten your flange bolts
【PART NUMBERS】3-Layered gasket for square port SBC 327 305 350 383 Engine. Before purchasing, please check compatibility (in the top left corner of the window) and make sure it meets your vehicle's specifications.
【IMPROVE SEALING】They are designed to help balance the flow between the exhaust header and exhaust flange to minimize warpage. These gaskets also accommodate rough or irregular surfaces to maintain a good seal while keeping the exhaust bolts tight...
【ENHANCED ENGINE PERFORMANCE】Made from Copper and Flexible Graphite Inlay, these exhaust gaskets feature an embossed ridge around the exhaust port for a tight, leak-proof seal. It can withstand the harsh conditions of your engine and provide...
【DIRECT REPLACEMENT】The gasket set are designed based on the original specifications, making installation simple with no additional modifications required, suitable for both professional repairs and DIY car owners.
PERFECT FIT Compatible with FORD SBF ENGINES. Designed specifically for Ford Small Block SBF engines, these header gaskets ensure a precise fit and reliable performance. Compatible with popular models including 289, 302, and 351W engines.
DURABLE SOLID COPPER CONSTRUCTION. Crafted from high-grade solid copper, these gaskets offer superior heat resistance, exceptional durability, and long-lasting performance. The composite rectangle port design ensures optimal exhaust flow, reducing leaks...
HIGH-PERFORMANCE & REUSABLE. Engineered for high-performance applications, these gaskets provide a tight, leak-proof seal without the need for additional sealants. Their reusable design makes them a cost-effective and eco-friendly choice.
EASY INSTALLATION & DIRECT REPLACEMENT. This set includes two spacers for straightforward installation, making it a hassle-free direct replacement for worn or damaged gaskets. Restore your engine’s efficiency with minimal effort!
Package includes: 2x Exhaust Manifold Gasket, 16 x Small Black Gasket.Backed by INNTURT 90-day worry-free warranty + technical support. If you have any installation questions, please contact us directly.
Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Header Gaskets
Understanding Header Gasket Materials
Composite/Fiberglass: These are common and affordable, offering good sealing for moderate temperatures and pressures. They are generally easy to install but may not be suitable for high-performance or racing applications.
Multi-Layer Steel (MLS): MLS gaskets are engineered for high-stress environments. They consist of multiple steel layers with embossed sealing elements, providing superior durability and resistance to extreme heat and pressure. Ideal for performance engines and demanding conditions.
Copper: Pure copper gaskets offer excellent thermal conductivity and conformability, making them ideal for custom header setups and high-temperature applications. They require careful installation and may need periodic retightening.
Key Considerations for Replacement
Vehicle Compatibility: Always verify that the gasket is designed for your specific vehicle's make, model, year, and engine size. Incorrect fitment will lead to leaks and potential damage.
Header Type: Ensure the gasket matches the style of your headers (e.g., shorty, long tube) and the cylinder head port shape.
Performance Needs: For daily drivers, standard composite gaskets might suffice. For racing or heavily modified engines, MLS or specialized materials are recommended for their superior resilience.
Installation: Proper installation is vital. Ensure mating surfaces are clean and flat. Follow the manufacturer's torque specifications precisely to achieve a reliable seal.
Frequently Asked Questions
What are the signs of a failing header gasket?
Common signs include a noticeable exhaust leak sound (ticking or puffing), a loss of engine power, and potentially increased fuel consumption. You might also detect exhaust fumes in the engine bay.
How often should header gaskets be replaced?
Header gaskets don't have a fixed replacement interval and typically fail due to damage, extreme heat, or improper installation. Replacement is usually done when headers are removed for maintenance or if symptoms of a leak appear.
Can I reuse my old header gaskets?
It is strongly advised not to reuse old header gaskets. Once compressed and subjected to heat cycles, their sealing ability is compromised, increasing the risk of leaks.
What is the difference between exhaust manifold gaskets and header gaskets?
Exhaust manifold gaskets seal the factory manifold to the cylinder head. Header gaskets seal aftermarket headers to the cylinder head, often requiring different shapes and materials due to higher performance demands.
Do different materials affect exhaust sound?
Yes, the gasket material can subtly influence exhaust sound. A better seal prevents leaks that can cause a 'ticking' sound, contributing to a cleaner, more consistent exhaust note from the system itself.
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