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.
- 【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.
- 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
- 🔎 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.
- COMPATIBILITY – Fits GMP Performance V8, 262 (4.3L), 265 (4.3L), 267 (4.4L), 283 (4.6L), 302 (4.9L), 305 (5.0L), 307 (5.L), 327 (5.3L), 350 (5.7L), 400 (6.6L)
- 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.
- 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
- Please note.: This car exhaust mat measures 5.07x3.46 inches (128.77x88 mm), is 0.07 inches (1.77 mm) thick, and has an inside diameter of 2.25 inches (57.15 mm). The exhaust flange gasket has 2 bolt holes spaced 3.10-4.65 inches (78.74-118.11 mm) apart...
- HIGH TEMPERATURE RESISTANT MATERIAL: This gasket is made of plated iron and graphite composite structural material, which is resistant to high temperature, high pressure and abrasion. The gasket material fills the tiny gap between the intake manifold and...
- HIGH SEALING PERFORMANCE: Exhaust flange gaskets have excellent sealing and insulating properties, preventing gas from escaping from the pipe, and also help to reduce engine noise and improve its efficiency, thereby extending the life of the engine...
- PERFORMANCE ENHANCEMENT: By using this exhaust manifold gasket, the pipe interface can be better connected to ensure the stability and tightness of the interface, which can enhance the power system of the car, it is an excellent performance automotive...
- 【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.
- Manufacturer Part Number: 12657093, 551696
- Fitment: The exhaust manifold header gasket fits for GM Gen V LT1 LT4 L8T L82 L83 L84 L86 L87 L8B, for Cadillac CTS-V Escalade Chevy Silverado 1500 2500 Camaro Corvette Suburban Tahoe GMC Sierra 1500 2500 3500 Yukon Savana 5.3L 6.2L V8 2014-2024
- Premium Quality: Made from multi-layer steel (MLS) that is designed to withstand high temperatures and provide a reliable seal
- Function: Helps to reduce noise and vibration for a quieter, smoother ride
- 🔎 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.
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Last update on 2026-10-18 / 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.
