{"product_id":"stainless-works-2003-11-crown-victoria-grand-marquis-4-6l-headers-1-5-8in-primaries-3in-h-flow-cats","title":"Stainless Works 1-5\/8in Headers \u0026 3in Cats | 98-11 Crown Vic\/Grand Marquis (CRVIC03HCAT)","description":"\u003ch1\u003eStainless Works Exhaust Components\u003c\/h1\u003e\n\u003ch2\u003eFits 2003–2011 Ford Crown Victoria and Mercury Grand Marquis with 4.6L V8\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart #:\u003c\/strong\u003e CRVIC03HCAT\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\nThe Stainless Works 2003-2011 Crown Victoria and Grand Marquis headers are engineered to enhance the performance and sound of your 4.6L V8 engine. Crafted from high-quality stainless steel, these headers are designed for durability, corrosion resistance, and optimal heat management. They are an ideal upgrade for enthusiasts seeking improved exhaust flow, increased responsiveness, and a more aggressive exhaust note. Whether you're restoring a classic or upgrading your daily driver, these headers provide a significant performance boost while maintaining a factory-like fit and finish.\n\nConstructed with precision TIG welding and made in the USA, these headers feature 1-5\/8\" primary tubes, slip-fit collectors, and 2.5\" diameter catted lead pipes. They are designed to fit the factory flanged connection point, ensuring straightforward installation with included O2 extensions and clamps. The headers are suitable for those looking to improve exhaust scavenging, reduce backpressure, and support overall engine efficiency.\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\nDesigned for high performance and longevity, these headers feature:\n\u003cul\u003e\n\u003cli\u003eConstructed from durable stainless steel for corrosion resistance and strength\u003c\/li\u003e\n\u003cli\u003ePrecision TIG welding for quality craftsmanship and reliable sealing\u003c\/li\u003e\n\u003cli\u003e1-5\/8\" primary tubes optimized for improved exhaust flow\u003c\/li\u003e\n\u003cli\u003eSlip-fit collectors for easy installation and maintenance\u003c\/li\u003e\n\u003cli\u003eIncludes necessary O2 extensions and clamps for a complete upgrade\u003c\/li\u003e\n\u003cli\u003eMade in the USA with strict quality standards\u003c\/li\u003e\n\u003cli\u003eDesigned to fit factory connection points for a seamless upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConstruction \u0026amp; Design\u003c\/h3\u003e\nThese headers are built from high-grade stainless steel, featuring TIG welds that ensure durability and a clean appearance. The 1-5\/8\" primaries are engineered to optimize exhaust flow, reducing backpressure and supporting better engine response. The slip-fit collector design allows for easier installation and future maintenance, while the included hardware ensures a secure fit.\n\n\u003ch3\u003ePerformance \u0026amp; Response\u003c\/h3\u003e\nBy improving exhaust scavenging and reducing restrictions, these headers help your engine breathe more freely. This results in enhanced throttle response, a more aggressive exhaust tone, and potential gains in power and torque across the RPM range. The stainless steel construction also helps maintain consistent performance under high temperatures.\n\n\u003ch3\u003eInstallation \u0026amp; Fitment\u003c\/h3\u003e\nThese headers are designed to fit the factory flanged connection points on 2003-2011 Crown Victoria and Grand Marquis models with a 4.6L V8 engine. Installation requires standard hand tools and may benefit from professional assistance to ensure proper fitment and sealing.\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\nThe package includes the stainless steel headers, slip-fit collectors, 2.5\" catted lead pipes, O2 extensions, and clamps, providing everything needed for a complete upgrade.","brand":"Stainless Works","offers":[{"title":"Default Title","offer_id":52251977679135,"sku":"CRVIC03HCAT","price":1936.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0229\/3877\/files\/0007841_bb5a0229be391ded9663545defbc0202.webp?v=1779691206","url":"https:\/\/shop.wheelflip.com\/products\/stainless-works-2003-11-crown-victoria-grand-marquis-4-6l-headers-1-5-8in-primaries-3in-h-flow-cats","provider":"WheelFlip","version":"1.0","type":"link"}