Choosing the correct exhaust header gaskets is crucial for maintaining engine performance and preventing costly exhaust leaks. A high-quality gasket ensures a tight seal between the cylinder head and the exhaust headers, optimizing exhaust flow and reducing noise. Selecting the right material and design can significantly impact your vehicle's longevity and efficiency.
- 🔎 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...
- 🔎 BUYING GUIDE: Distance between the two bolt holes of the flange gasket is 3.49"/ 88.7mm and fits 10mm bolts. Compatible with SBC, BBC, 302, 350, 454, and fits all 3.5 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...
- 🔎 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...
- 【PART NUMBERS】OE numbers 12617944 12558573 12600530 12620947 MS16124, Bolts OE 551696. Package includes: 2PCS exhaust manifold header gasket + 12bolts.
- 【VEHCLE COMPATIBLE】For Cadillac CTS, Escalade EXT ESV; For Chevrolet Avalanche 1500 Camaro, Caprice, Colorado, Corvette, Express 1500 2500, Impala, Silverado 1500 2500 3500, SS, SSR, Suburban 1500 2500, Tahoe, Trailblazer EXT, Trailblazer, For GMC...
- 【ENHANCED ENGINE PERFORMANCE】The exhaust header manifold gaskets kit are constructed of multi-layer steel to resist the high temperatures generated in the combustion chamber. Prevents exhaust leaks, reduces engine stress and improves fuel efficiency.
- 【EASY TO INSTALL】The exhaust manifold gasket is designed based on the original gasket specifications, making installation simple with no additional modifications required, suitable for both professional repairs and DIY car owners.
- 【NOTE】Before purchasing, please check compatibility and make sure it meets your vehicle's specifications.
- Aluminum Reinforced Graphite Exhaust Manifold Gasket
- Complete Hardware Kit for Installing Aftermarket Header to your Vehicle
- Great for Replacement of Missing or Damaged Gaskets
- 100% Brand New
- Installation Instruction is NOT Included
- Package includes:2 triangular washers
- Material: Stainless Steel and Graphite Construction, High & Low Temperature Resistant, Anti-high Pressure
- Size: 2.5 inches (63.5mm), approx. 94mm/3.7 Inch long, 92mm/3.6 Inch wide, hole spacing approx. 72mm/2.8 Inches
- Universal Fiment
- Reliable Sealing，Stop Leaks and Rattles
- 3" Pipe; Universal 3” Collector Flange, 3 Bolt Holes, 3-3/8" Bolt Hole Spacing, 2/Set
- 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
- 【Compatiable With】-- Chevy SBC; Chevy BBC 302 350 454 383.
- 【Material】--Our ,Copper header collector gaskets made by professional equipment and engineers with high-quality materials, have stable performance, which will ensure that the Copper header collector gaskets will last longer.
- 【Package Includes】-- 2PCS Copper header collector gaskets.【Package Includes】-- 2PCS Copper header collector gaskets.【Package Includes】-- 2PCS Copper header collector gaskets.【Package Includes】-- 2PCS Copper header collector...
- 【Professional Customer Service】--We inspected every product before sending out,to ensure you have the best quality product,and the best value.If you have any problem please let us know your car make model and show the issue by pictures .We would take...
- Aluminum Reinforced Graphite Exhaust Manifold Gasket
- Complete Hardware Kit for Installing Aftermarket Header to your Vehicle
- Great for Replacement of Missing or Damaged Gaskets
- 100% Brand New
- Installation Instruction is NOT Included
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Last update on 2026-09-03 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Exhaust Header Gaskets
Understanding Gasket Materials
The material of your exhaust header gaskets is paramount, as it dictates durability and heat resistance. Common options include multi-layer steel (MLS), graphite, and composite materials. MLS gaskets are highly durable and excellent for high-performance applications due to their ability to withstand extreme temperatures and pressures without blowing out. Graphite gaskets offer good conformability, making them suitable for sealing minor surface imperfections, and they handle heat well. Composite gaskets, often a blend of fibers and metal, provide a balance of sealing capability and cost-effectiveness for standard applications. Consider your engine's operating temperature and exhaust system demands when making your selection to ensure optimal performance and longevity.
Key Design and Fitment Considerations
Proper fitment is critical for an effective seal. Header gaskets are designed specifically for certain engine types and header configurations, so always verify compatibility with your vehicle's make, model, year, and specific header brand. Pay close attention to port shape and size – they must precisely match your headers and cylinder head to prevent exhaust gas turbulence and potential leaks. When checking fitment, consider:
- Engine compatibility (make, model, year)
- Header brand and specific design
- Exhaust port shape and size
- Bolt hole pattern alignment
Some gaskets feature a raised port design or a crush ring for enhanced sealing. Ensure the bolt hole pattern aligns perfectly to facilitate a straightforward installation and a secure, leak-free connection. Incorrect fitment can lead to premature gasket failure and reduced engine efficiency.
Installation Tips for Longevity
Even the best gaskets can fail if not installed correctly. Before installation, thoroughly clean both the cylinder head and header flange surfaces, removing any old gasket material, carbon buildup, or debris to ensure a perfectly flat and smooth mating surface. Inspect the flanges for warpage, as a warped surface can compromise the seal. Always use new hardware, such as bolts and studs, and apply anti-seize compound to threads for easier future removal. Follow the manufacturer's torque specifications and tightening sequence (often a crisscross pattern) to evenly compress the gasket and achieve a reliable, long-lasting seal, preventing leaks and ensuring optimal exhaust performance.