{"product_id":"c8-corvette-grand-sport-kooks-21821400-super-street-headers","title":"C8 Corvette Grand Sport Kooks Super Street Headers","description":"\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/cca-free-shipping-performance-banner-v1_png.png?v=1784299920\" alt=\"Free shipping in the continental U.S. on Kooks Corvette headers\" style=\"display: block; max-width: 100%; height: auto; margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eKooks 21821400 Super Street Headers for the C8 Corvette Grand Sport\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eKooks 21821400 Super Street Series headers\u003c\/strong\u003e are designed for the \u003cstrong\u003e2027 and newer C8 Corvette Grand Sport with the 6.7L LS6 V8\u003c\/strong\u003e. Built from \u003cstrong\u003e304 stainless steel with 1-7\/8-inch primary tubes\u003c\/strong\u003e, they use oval ports and the stock cylinder-head bolt pattern. Flanged collector outlets connect directly to the original catalytic converters or compatible Kooks Super Street OEM connections.\u003c\/p\u003e\n\u003cp\u003eFor C8 Grand Sport owners who want to upgrade the headers while retaining the factory catalytic converters, the Super Street design connects directly to those converters and requires no tune for the header installation. The bolt kit is included, but header gaskets are not. Plan to reuse suitable factory gaskets or order replacements from Chevrolet.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Kooks Super Street\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary tube diameter:\u003c\/strong\u003e 1-7\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort shape:\u003c\/strong\u003e Oval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Stock cylinder-head bolt pattern\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet:\u003c\/strong\u003e Flanged collector connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Installation bolt kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader gaskets:\u003c\/strong\u003e Not included; reuse suitable factory gaskets or obtain a new set from Chevrolet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cp\u003eThe 304 stainless steel construction provides corrosion resistance, and the oval ports and stock bolt pattern match the specified Grand Sport application. Compatible Kooks Super Street OEM connections offer another connection option when planning a broader exhaust upgrade.\u003c\/p\u003e\n\u003ch3\u003eImportant Installation Notes\u003c\/h3\u003e\n\u003cp\u003eConfirm gasket condition and availability with your installer before the appointment. Connection pipes are separate components and are not included with the header kit.\u003c\/p\u003e\n\u003cp\u003eThe no-tune requirement applies to this header installation. Other engine or exhaust changes may have different requirements. Use installation guidance specific to the 6.7L Grand Sport, including the correct sensor provisions, sealing procedure and clearances.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"color:rgb(255, 42, 0);\"\u003eCORVETTE COMPATIBILITY\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneration:\u003c\/strong\u003e C8 Corvette\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Grand Sport\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel years:\u003c\/strong\u003e 2027 and newer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e 6.7L LS6 V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot for C8 Corvette Stingray, E-Ray, Z06 or ZR1.\u003c\/p\u003e\n\u003cp\u003eShop Kooks 21821400 Super Street headers for your C8 Corvette Grand Sport at Custom Corvette Accessories.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":67597828653293,"sku":"21821400","price":1490.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/kooks-21821400-header-pair.png?v=1790714507","url":"https:\/\/www.corvettepartsandaccessories.com\/products\/c8-corvette-grand-sport-kooks-21821400-super-street-headers","provider":"Corvette Parts from Custom Corvette Accessories","version":"1.0","type":"link"}