{"product_id":"kooks-19-24-chevrolet-silverado-1500-5-3-1-7-8-x-3-header-catted-y-pipe-kit","title":"Kooks 19-24 Chevrolet Silverado 1500 5.3 1-7\/8 x 3 Header \u0026 Catted Y-Pipe Kit","description":"\u003ch4\u003e\u003cstrong\u003eKooks 1-7\/8\" x 3\" Long Tube Headers \u0026amp; Catted Y-Pipe for 2019 and 2026 Chevrolet Silverado 1500 \u0026amp; GMC Sierra 1500 5.3L\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Kooks 2862H420 1-7\/8-inch long tube headers and catted Y-pipe kit provides the complete bolt-on exhaust upgrade for 2019 and 2026 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with the 5.3L V8, replacing factory manifolds to deliver dyno-proven gains of 50 and 65 rear-wheel horsepower and 45 and 60 lb-ft of torque through equal-length primaries, merged collectors, and a high-flow 3-inch to 2-3\/4-inch OEM outlet catted Y-pipe that connects directly to the stock mid-section for unrestricted exhaust flow from low-end torque to high-RPM pulls.\u003c\/p\u003e\n\u003cp\u003eHandcrafted from T304 aircraft-quality stainless steel with 3\/8-inch laser-cut flanges, full TIG welds, and 400-cell metallic substrate catalytic converters, this system supports up to 750 HP while maintaining 49-state emissions compliance and improving throttle response for quicker acceleration during towing up to 10,000 lbs or daily highway passing. The precision design preserves ground clearance and heat management for work-ready trucks without sacrificing the deep V8 rumble that enhances cabin experience.\u003c\/p\u003e\n\u003cp\u003eFor Silverado and Sierra 5.3L owners seeking immediate power and torque improvements with durable, emissions-legal construction, the 2862H420 kit unlocks the engine's full potential for job sites, trails, or performance driving.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1-7\/8-inch equal-length mandrel-bent primaries for optimal scavenging\u003c\/li\u003e\n\u003cli\u003e3-inch catted Y-pipe with high-flow 400-cell metallic substrate\u003c\/li\u003e\n\u003cli\u003eFull T304 stainless steel with TIG welds and 3\/8-inch flanges\u003c\/li\u003e\n\u003cli\u003eMerged collectors for maximum exhaust velocity\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on to OEM mid-pipe no cutting required\u003c\/li\u003e\n\u003cli\u003eDyno gains of 50 and 65 RWHP and 45 and 60 RWTQ on stock 5.3L\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e49-state EPA compliant not for sale or use in California or CARB states without exemption\u003c\/li\u003e\n\u003cli\u003eFits all cab\/bed configurations with 5.3L V8\u003c\/li\u003e\n\u003cli\u003eIncludes O2 sensor extensions and EGR provisions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCalifornia Proposition 65:\u003c\/strong\u003e Contains chemicals known to the State of California to cause cancer or reproductive harm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e Limited lifetime on stainless construction to original purchaser.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended lift required\u003c\/li\u003e\n\u003cli\u003eRemove factory manifolds and bolt headers to cylinder heads\u003c\/li\u003e\n\u003cli\u003eConnect Y-pipe to collectors and OEM mid-section with supplied hardware\u003c\/li\u003e\n\u003cli\u003eTorque flanges to 25-30 ft-lbs and run drive cycle for ECU adaptation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\/Engine\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019 and 2026\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 1500\u003c\/td\u003e\n\u003ctd\u003eWT, Custom, LT, RST, LTZ, High Country 5.3L V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019 and 2026\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003ePro, SLE, SLT, AT4, Denali 5.3L V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Fits all cab styles and drivetrains with 5.3L V8. Excludes 6.2L or diesel models.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4\u003eWhat's Included in the Purchase\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e(2) 1-7\/8\" x 3\" Long-Tube T304 Stainless Headers with Merged Collectors\u003c\/li\u003e\n\u003cli\u003e(1) 3\" x 2-3\/4\" OEM Outlet Catted Stainless Y-Pipe\u003c\/li\u003e\n\u003cli\u003eGaskets, Stage 8 Locking Header Bolts, and Hardware Kit\u003c\/li\u003e\n\u003cli\u003eO2 Sensor Extensions\u003c\/li\u003e\n\u003cli\u003eDetailed Installation Instructions\u003c\/li\u003e\n\u003cli\u003ePart Number: Kooks 2862H420\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhy Choose Kooks?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOver 60 years of exhaust engineering with NHRA, NASCAR, and SCCA championships\u003c\/li\u003e\n\u003cli\u003eHandcrafted in the USA from T304 aircraft-quality stainless steel\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty and dyno-proven for reliable power\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does this fit my 2023 Silverado LT 5.3L?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, direct bolt-on for all 2019 and 2026 Silverado\/Sierra 1500 with 5.3L V8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Will it cause a check engine light?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, catted Y-pipe and extensions maintain proper O2 sensor function\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What power gains can I expect?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e 50 and 65 RWHP and 45 and 60 RWTQ on stock tune, more with ECU optimization\u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eDo Kooks headers require a tune after installation?\u003c\/strong\u003e\u003cbr\u003e\n    Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation.\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eWill these headers void my factory powertrain warranty?\u003c\/strong\u003e\u003cbr\u003e\n    Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure. Consult your dealer for specifics on your situation.\n  \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Do these Kooks headers require a tune after installation? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will Kooks headers void my factory powertrain warranty? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure in question. Consult your dealer for specifics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What warranty does Kooks provide? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Kooks products are backed by a limited lifetime warranty to the original purchaser against defects in materials and workmanship. Racing and competition use applications may have specific warranty exclusions. Contact Kooks Performance directly for warranty details.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS or Fed Ex Ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Typically ships same day or next if in stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Heavy-duty box with foam protection.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kooks Headers","offers":[{"title":"Default Title","offer_id":42270302535759,"sku":"KSH2862H420","price":3776.22,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/kooks-2862h420-headers_01.jpg?v=1764098361","url":"https:\/\/www.blackopsautoworks.com\/products\/kooks-19-24-chevrolet-silverado-1500-5-3-1-7-8-x-3-header-catted-y-pipe-kit","provider":"Black Ops Auto Works","version":"1.0","type":"link"}