{"product_id":"c8-corvette-grand-sport-grand-sport-x-kooks-218133bk-catted-connections","title":"C8 Corvette Grand Sport Kooks Ultra-GREEN Cats with Heat Blankets","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 218133BK catted connections with heat blankets\" style=\"display: block; max-width: 100%; height: auto; margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eKooks 218133BK Catted Connections for C8 Corvette Grand Sport and Grand Sport X\u003c\/h2\u003e\n\u003cp\u003eChoose the \u003cstrong\u003eKooks 218133BK Ultra-GREEN catted connection kit with heat blankets\u003c\/strong\u003e for your \u003cstrong\u003e2027 C8 Corvette Grand Sport or Grand Sport X with the 6.7L LS6 V8\u003c\/strong\u003e. The kit brings together both catted connections, matching Kooks heat blankets, and the gasket and bolt kit. Its \u003cstrong\u003e3-inch 304 stainless steel tubing and 5-inch catalyst bodies\u003c\/strong\u003e connect the OEM manifolds or Kooks headers to the OEM cat-back through stock-pattern flanges. Confirm your complete exhaust configuration before ordering.\u003c\/p\u003e\n\u003cp\u003eThis kit addresses the catalytic-converter section of your exhaust. The exhaust connection sequence is \u003cstrong\u003eOEM manifolds or Kooks headers → these catted connections → OEM cat-back\u003c\/strong\u003e. That distinction matters when comparing exhaust parts: 218133BK includes the catalysts and blankets together; headers, rear mufflers and exhaust tips are separate components.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand and part number:\u003c\/strong\u003e Kooks 218133BK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Ultra-GREEN catted connection pair with heat blankets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Replaces the original catalytic converters between the manifolds or headers and rear cat-back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection tubing:\u003c\/strong\u003e 3-inch 304 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalyst bodies:\u003c\/strong\u003e 5-inch-bodied Ultra-GREEN; this dimension describes the catalyst bodies, not the exhaust pipe or tips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnections:\u003c\/strong\u003e Flanged inlet and outlet with the stock bolt pattern\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Both catted connections, Kooks 218133B2 heat blankets, and gasket and bolt kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne matched catalyst-and-blanket kit:\u003c\/strong\u003e The included 218133B2 blankets are supplied with the catted connections, so you can identify the complete package rather than inadvertently selecting a blanket-only part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlan around the factory rear exhaust:\u003c\/strong\u003e The OEM cat-back interface lets you focus on the catalyst section without treating rear mufflers and tips as part of this purchase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo engine-side interfaces:\u003c\/strong\u003e The connections accommodate OEM manifolds or Kooks headers. If your car already has aftermarket components, confirm their exact part numbers and interfaces before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm your sound or power goals:\u003c\/strong\u003e If your goal is a particular sound or power change, confirm the result for your complete configuration before choosing parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the complete combination:\u003c\/strong\u003e Identify your 2027 Grand Sport or Grand Sport X, NPP equipment, center-exit or corner-exit rear exhaust, and the make and part number of any existing headers or cat-back. Exact exhaust-option compatibility must be confirmed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm installation and calibration:\u003c\/strong\u003e Have a qualified installer verify the GS or GSX procedure, sensor provisions and calibration requirements for your setup. Ask whether your exact combination needs tuning or further checks for warning-light behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify emissions eligibility before purchase:\u003c\/strong\u003e This kit replaces original catalytic converters. Ultra-GREEN branding does not by itself establish approval for your vehicle and location or guarantee an inspection pass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlan the installation date:\u003c\/strong\u003e Confirm current availability and lead time before scheduling work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #ff2a00;\"\u003eCORVETTE COMPATIBILITY\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 year:\u003c\/strong\u003e 2027\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModels:\u003c\/strong\u003e Grand Sport and Grand Sport X\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e 6.7L LS6 V8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e Eight-speed dual-clutch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust interfaces:\u003c\/strong\u003e OEM manifolds or Kooks headers to OEM cat-back; confirm your exact equipment combination\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Buy This Product from Custom Corvette Accessories\u003c\/h3\u003e\n\u003cp\u003eCompare the exact 218133BK kit, its included pieces and its 2027 Grand Sport or Grand Sport X fitment in one place. Before ordering, contact Custom Corvette Accessories with your trim, NPP equipment and current exhaust part numbers so any remaining fitment and installation questions can be addressed for the parts you plan to use.\u003c\/p\u003e\n","brand":"Kooks","offers":[{"title":"Default Title","offer_id":67632377299181,"sku":"218133BK","price":4413.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/c8-grand-sport-grand-sport-x-kooks-218133bk-bare-catalyst-pair.png?v=1791063428","url":"https:\/\/www.corvettepartsandaccessories.com\/products\/c8-corvette-grand-sport-grand-sport-x-kooks-218133bk-catted-connections","provider":"Corvette Parts from Custom Corvette Accessories","version":"1.0","type":"link"}