{"product":{"id":11350202384726,"title":"Kooks Corvette C5 Emissions-Fitting Header and X-Pipe Kits (1997-2000)","body_html":"\u003ch2\u003eUpgrade your early C5 with headers made for its fittings\u003c\/h2\u003e\u003cp\u003eGive your early C5 a matched long tube header and X-pipe upgrade while choosing the header version with emissions fittings. These kits use 1-7\/8\" primaries and a 2-1\/2\" OEM rear connection, with a choice of Performance or GREEN cats.\u003c\/p\u003e\u003cp\u003eSKUs: 2151H420, 2151H430\u003c\/p\u003e\u003ch2\u003eChoose the early-car header version\u003c\/h2\u003e\u003cp\u003eThe emissions fittings distinguish these packages from the C5 kits supplied without them. Both kits pair the 1-7\/8\" headers with their matching X-pipe and join the factory-style rear exhaust. The supported range for these exact two SKUs is 1997-2000.\u003c\/p\u003e\u003ch2\u003ePlan for your engine, including later modifications\u003c\/h2\u003e\u003cp\u003ePerformance cats are for naturally aspirated applications. GREEN is the catted choice here that supports forced induction. If a supercharger is already fitted or part of the plan, choose the catalyst for that completed engine rather than buying around the original factory specification.\u003c\/p\u003e\u003ch2\u003eChoose your configuration\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"variant-comparison\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eConfiguration\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eSupplied arrangement\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFitting \/ engine conditions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2151H420\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Cat Type: Performance Cats; Includes Emissions Fittings: Yes (1997-2000)\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; Performance Cats front connections\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2151H430\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Cat Type: GREEN Cats; Includes Emissions Fittings: Yes (1997-2000)\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; GREEN Cats front connections\u003c\/td\u003e\n\u003ctd\u003eUse the SKU-specific vehicle rows below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eTuning for your exhaust upgrade\u003c\/h2\u003e\u003cp\u003eWe recommend tuning with every header installation so the calibration suits your new headers, complete exhaust and fuel. \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/pages\/contact\"\u003eContact us\u003c\/a\u003e to discuss the right tuning route for your vehicle.\u003c\/p\u003e\u003ch2\u003eVehicle fitment\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"vehicle-fitment\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eYears\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eVehicle \/ trim\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eEngine\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eApplicable SKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFitting conditions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1997-2000\u003c\/td\u003e\n\u003ctd\u003eChevrolet Corvette Base\u003c\/td\u003e\n\u003ctd\u003e5.7L V8\u003c\/td\u003e\n\u003ctd\u003e2151H420, 2151H430\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003eChevrolet Corvette Indianapolis 500 Pace Car\u003c\/td\u003e\n\u003ctd\u003e5.7L V8\u003c\/td\u003e\n\u003ctd\u003e2151H420, 2151H430\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"technical-specifications\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKUs\u003c\/td\u003e\n\u003ctd\u003e2151H420, 2151H430\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e1997-2000 Corvette C5 5.7L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeaders\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" primaries; 3\" collectors; emissions fittings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrossover\u003c\/td\u003e\n\u003ctd\u003eSupplied X-pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear interface\u003c\/td\u003e\n\u003ctd\u003e2-1\/2\" OEM-style exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChoices\u003c\/td\u003e\n\u003ctd\u003e2151H420 Performance; 2151H430 GREEN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance use\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat is different about these C5 kits?\u003c\/h3\u003e\u003cp\u003eTheir headers include the emissions fittings for the supported 1997-2000 application.\u003c\/p\u003e\u003ch3\u003eDo they connect to the original rear exhaust?\u003c\/h3\u003e\u003cp\u003eThey use the 2-1\/2\" OEM-style rear interface.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e2151H420: Competition, off-road and track use only. Not for use on public roads.\u003c\/p\u003e\u003ch2\u003eOrdering and delivery\u003c\/h2\u003e\u003cp\u003eEstimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.\u003c\/p\u003e","vendor":"Kooks","product_type":"Header Kits","created_at":"2026-10-08T10:40:46+01:00","handle":"kooks-1997-2004-c5-corvette-header-x-pipe-kits-f8e4b91c","updated_at":"2026-10-10T18:25:53+01:00","published_at":"2026-10-09T13:46:08+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:chevrolet-corvette, make:chevrolet, type:header-kit","variants":[{"id":55646887641430,"product_id":11350202384726,"title":"1-7\/8\" \/ Performance Cats \/ Yes (1997-2000)","price":"3642.46","sku":"2151H420","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"Performance Cats","option3":"Yes (1997-2000)","created_at":"2026-10-08T10:40:46+01:00","updated_at":"2026-10-10T18:25:53+01:00","taxable":true,"barcode":"842422178017","grams":27216,"image_id":null,"weight":27.216,"weight_unit":"kg","requires_shipping":true,"quantity_rule":{"min":1,"max":null,"increment":1},"price_currency":"GBP","compare_at_price_currency":"","quantity_price_breaks":[]},{"id":55646887674198,"product_id":11350202384726,"title":"1-7\/8\" \/ GREEN Cats \/ Yes (1997-2000)","price":"4210.45","sku":"2151H430","position":2,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"GREEN Cats","option3":"Yes (1997-2000)","created_at":"2026-10-08T10:40:46+01:00","updated_at":"2026-10-10T18:25:53+01:00","taxable":true,"barcode":"842422178024","grams":27216,"image_id":null,"weight":27.216,"weight_unit":"kg","requires_shipping":true,"quantity_rule":{"min":1,"max":null,"increment":1},"price_currency":"GBP","compare_at_price_currency":"","quantity_price_breaks":[]}],"options":[{"id":14512382312790,"product_id":11350202384726,"name":"Header Size","position":1,"values":["1-7\/8\""]},{"id":14512382345558,"product_id":11350202384726,"name":"Cat Type","position":2,"values":["Performance Cats","GREEN Cats"]},{"id":14512382378326,"product_id":11350202384726,"name":"Includes Emissions Fittings","position":3,"values":["Yes (1997-2000)"]}],"images":[{"id":86449167892822,"product_id":11350202384726,"position":1,"created_at":"2026-10-08T10:40:46+01:00","updated_at":"2026-10-08T10:40:49+01:00","alt":"Kooks 1997-2004 C5 Corvette Header\/X-Pipe Kits - 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