{"product_id":"remflex-3003-square-port-exhaust-header-gasket-2-pack-for-ford-v8-windsor-302-351-81-97","title":"Remflex 3003 Square Port Exhaust Header Gasket – 2-Pack for Ford V8 Windsor 302\/351 (81-97)","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMeet the Remflex 3003 Square Port Exhaust Header Gasket, designed for Ford V8 Windsor engines. This gasket lives at the interface where square-port headers meet the cylinder head, a spot that endures repeated heating and cooling cycles. Crafted from 100% flexible graphite, it aims to maintain a seal even as metal parts expand and contract during operation, helping to minimize leaks without relying on traditional rubber components.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility and fit\u003c\/h3\u003e\n\u003cp\u003eThe gasket set is built around the stock 1-1\/8 inch width by 1-1\/2 inch height square-port pattern. It fits Ford V8 Windsor powerplants in the 302 (1981–1995) and 351 (1969–1997) families, with the 2-per-set configuration giving you enough material for a complete header pair installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1-1\/8\" width x 1-1\/2\" height square port\u003c\/li\u003e\n  \u003cli\u003eStock square port; Ford V8 Windsor families\u003c\/li\u003e\n  \u003cli\u003e2 gaskets per set\u003c\/li\u003e\n  \u003cli\u003eFits 302 ('81-'95) and 351 Windsor ('69-'97)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaterial, design, and sealing action\u003c\/h3\u003e\n\u003cp\u003eWith a standard thickness of 1\/8 inch, these gaskets are designed to crush about 50%, filling pits and minor surface irregularities up to 1\/16 inch. The 100% flexible graphite formulation contains no rubber binders or composite materials, reducing the risk of shrinking or hardening over time. This composition helps the gasket accommodate the contraction and expansion of dissimilar metals, such as aluminum heads paired with steel headers or manifolds, while aiming to maintain a consistent seal across temperature swings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/8\" thick; crushes ~50% to fill gaps\u003c\/li\u003e\n  \u003cli\u003e100% flexible graphite; no rubber binders\u003c\/li\u003e\n  \u003cli\u003eSeals dissimilar metals through thermal cycles\u003c\/li\u003e\n  \u003cli\u003eResists shrinking and hardening with heat\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePractical use and expectations\u003c\/h3\u003e\n\u003cp\u003eIn real-world setups, this gasket is intended to address common leaks at square-port interfaces. Depending on your engine configuration, you may notice fewer leaks at the flange, a more stable seal across heat cycles, and potentially less re-tightening required after a break-in period. The graphite-based design supports creep under pressure, helping maintain a seal as parts move with temperature changes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePotential reduction in flange leaks\u003c\/li\u003e\n  \u003cli\u003eImproved seal stability across heat cycles\u003c\/li\u003e\n  \u003cli\u003eMay reduce the need for frequent re-tightening\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included and installation notes\u003c\/h3\u003e\n\u003cp\u003eThis 2-pack is sized for stock square-port configurations and is compatible with standard header or manifold surfaces. For best results, ensure mating surfaces are clean and lightly prepared to promote seating. Use proper torque on mounting bolts and follow standard header installation practices. These gaskets are designed to complement proper flange preparation, not replace it.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo gaskets included\u003c\/li\u003e\n  \u003cli\u003eClean mating surfaces before install\u003c\/li\u003e\n  \u003cli\u003eFollow standard torque procedures\u003c\/li\u003e\n  \u003cli\u003eWorks best with proper flange prep\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What vehicles and ports does the Remflex 3003 gasket fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for Ford V8 Windsor square-port applications; fits 302 ('81-'95) and 351 Windsor ('69-'97); 1-1\/8\" x 1-1\/2\" ports; two gaskets per kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What makes the Remflex 3003 gasket different from rubber or composite gaskets?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Made from 100% flexible graphite with no binders; can crush to fill gaps and resist shrinking or hardening with heat.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Remflex","offers":[{"title":"Default Title","offer_id":42470239043669,"sku":"B00B2HM8XW","price":45.41,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/remflex-3003-square-port-exhaust-header-gasket.jpg?v=1778126019","url":"https:\/\/plentytorque.co.uk\/products\/remflex-3003-square-port-exhaust-header-gasket-2-pack-for-ford-v8-windsor-302-351-81-97","provider":"PlentyTorque","version":"1.0","type":"link"}