{"product_id":"amvirtuo-long-tube-headers-chevy-gmc-c10-k10-283-400","title":"AMVirtuo Long Tube Headers for 1966-1987 Chevy GMC Blazer Suburban C10 C20 C30 K10 K20 K30 Trucks, 283-400 cu.in. Small Block V8","description":"\u003cp\u003e\u003cstrong\u003eFitment and Compliance Notice:\u003c\/strong\u003e Professional installation is recommended. Verify vehicle fitment, clearance, exhaust requirements, and local regulations before purchase.\u003c\/p\u003e\n\n\u003c!-- H2: Key Features --\u003e\n\u003ch2\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/h2\u003e\n\u003cdiv class=\"key-features\"\u003e\n\u003ch3\u003e\u003cb\u003eSmall Block Chevy V8 Compatibility\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThese SBC headers are engineered for 283-400 cu. in. Small Block Chevy V8 engines, delivering precise fitment for classic Chevy and GMC trucks from 1966-1987. Compatible with both 2WD and 4WD configurations, including C10, K10, C20, K20, C30, K30 series trucks, Blazer, Jimmy, and Suburban models.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFull-Length Performance Design\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eFeaturing full-length mandrel-bent tubing with precision-engineered curves, these long tube headers minimise exhaust backpressure for improved exhaust scavenging efficiency. The optimised design delivers potential improvements in throttle response and low-end torque, especially when paired with performance exhaust systems.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003ePremium T304 Stainless Steel Construction\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eCrafted from high-quality T304 stainless steel with a polished chrome finish, these \u003cb\u003eChevy truck headers\u003c\/b\u003e deliver exceptional durability and corrosion resistance. The robust 5\/16\" laser-cut head flanges prevent cracking or warping, ensuring a leak-free seal for years to come.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTIG-Welded Durability\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eEach set features precision multi-pass TIG welding throughout, creating wear-resistant and crack-proof joints that withstand 1,600°F continuous exhaust temperatures. The reinforced collector joints prevent cracking under extreme heat and vibration, ensuring long-term durability for high-performance engines.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eComplete Installation Kit\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eIncludes all mounting hardware for Designed fitment. Professional shop installation is recommended for optimal alignment and sealing. Note: To prevent clearance issues, use short-thread spark plugs and plug wire heat shields—standard plugs may require modifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H2: Description --\u003e\n\u003ch2\u003e\u003cb\u003eDescription\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eTransform your classic Chevy or GMC truck with AMVirtuo \u003cspan style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003elong tube headers, engineered specifically for Small-Block Chevy V8 \u003c\/span\u003eapplications. Whether you're restoring a vintage C10 pickup, upgrading your K10 4x4, or building a high-performance Suburban, these headers deliver the perfect combination of power, sound, and reliability.\u003c\/p\u003e\n\u003cp\u003eOur Chevy C10\u003cb\u003e \u003c\/b\u003eheaders are manufactured from T304 stainless steel with a mirror-polished chrome finish that resists corrosion and looks stunning under the hood. The 1-1\/2\" primary tubes and 3\" collector are optimised for Small Block Chevy engines ranging from 283 to 400 cubic inches, providing excellent exhaust velocity without sacrificing low-end torque.\u003c\/p\u003e\n\u003cp\u003eAt AMVirtuo, we believe performance upgrades shouldn't be a luxury. That's why we've designed these small block Chevy headers to offer professional-grade quality at a price point that respects your build budget. Every set is tested for fitment and durability, ensuring your classic truck project starts with a solid foundation.\u003c\/p\u003e\n\u003c!-- H2: Vehicle Fitment --\u003e\n\u003ch2\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eDrive\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1987\u003c\/td\u003e\n\u003ctd\u003eChevrolet C10 \/ C20 \/ C30\u003c\/td\u003e\n\u003ctd\u003e2WD\u003c\/td\u003e\n\u003ctd\u003e283-400 cu.in. Small Block V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1987\u003c\/td\u003e\n\u003ctd\u003eChevrolet K10 \/ K20 \/ K30\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003e283-400 cu.in. Small Block V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1987\u003c\/td\u003e\n\u003ctd\u003eGMC C1500 \/ C2500 \/ C3500\u003c\/td\u003e\n\u003ctd\u003e2WD\u003c\/td\u003e\n\u003ctd\u003e283-400 cu.in. Small Block V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1987\u003c\/td\u003e\n\u003ctd\u003eGMC K1500 \/ K2500 \/ K3500\u003c\/td\u003e\n\u003ctd\u003e4WD\u003c\/td\u003e\n\u003ctd\u003e283-400 cu.in. Small Block V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1991\u003c\/td\u003e\n\u003ctd\u003eChevrolet Blazer \/ Suburban\u003c\/td\u003e\n\u003ctd\u003e2WD \/ 4WD\u003c\/td\u003e\n\u003ctd\u003e283-400 cu.in. Small Block V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1991\u003c\/td\u003e\n\u003ctd\u003eGMC Jimmy \/ Suburban\u003c\/td\u003e\n\u003ctd\u003e2WD \/ 4WD\u003c\/td\u003e\n\u003ctd\u003e283-400 cu.in. Small Block V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1988-1991\u003c\/td\u003e\n\u003ctd\u003eChevrolet \/ GMC R\/V Series (Square Body 3500)\u003c\/td\u003e\n\u003ctd\u003e2WD \/ 4WD\u003c\/td\u003e\n\u003ctd\u003e283-400 cu.in. Small Block V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cp class=\"warning-title\"\u003e⚠️ Important Fitment Notes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eEngine Compatibility:\u003c\/b\u003e Designed for Small Block Chevy (SBC) V8 engines only—283, 305, 307, 327, 350, and 400 cubic inches. Will NOT fit Big Block Chevy (BBC) or LS-series engines.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSpark Plug Requirements:\u003c\/b\u003e Angled spark plug cylinder heads (common in 1973-1987 models) may require heat shield adjustments. Use short-thread spark plugs (Accel 0576S conical seat or Accel 0414S gasket seat) and plug wire heat shields to prevent clearance issues.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e4WD Considerations:\u003c\/b\u003e Stock-height 4WD trucks may experience interference with the front driveshaft. Lifted trucks typically have no issues.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSource:\u003c\/b\u003e Product specifications and fitment based on listed product specifications and GM Square Body Truck Forum installation guides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H2: Technical Specifications --\u003e\n\u003ch2\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader Type\u003c\/td\u003e\n\u003ctd\u003eLong Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e1-1\/2\" (38mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector Diameter\u003c\/td\u003e\n\u003ctd\u003e3\" (76mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Flange Thickness\u003c\/td\u003e\n\u003ctd\u003e5\/16\" (8.0mm) Laser-Cut Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePipe Thickness\u003c\/td\u003e\n\u003ctd\u003e16 Gauge (1.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eT304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Finish\u003c\/td\u003e\n\u003ctd\u003ePolished Chrome\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWelding\u003c\/td\u003e\n\u003ctd\u003eMulti-Pass TIG Welded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment Type\u003c\/td\u003e\n\u003ctd\u003eDirect Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- H2: Headers vs Stock Manifolds --\u003e\n\u003ch2\u003e\u003cb\u003eHeaders vs Stock Exhaust Manifolds\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eIf you're debating between upgrading to long tube headers or replacing them with factory-style manifolds, here's what you need to know:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eStock Manifolds\u003c\/th\u003e\n\u003cth\u003eAMVirtuo Long Tube Headers\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCast Iron (prone to cracking)\u003c\/td\u003e\n\u003ctd\u003eT304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eRestrictive internal passages\u003c\/td\u003e\n\u003ctd\u003eFull-length mandrel-bent tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Flow\u003c\/td\u003e\n\u003ctd\u003eCreates backpressure\u003c\/td\u003e\n\u003ctd\u003eEliminates backpressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance\u003c\/td\u003e\n\u003ctd\u003eLimited power gains\u003c\/td\u003e\n\u003ctd\u003eImproved throttle response \u0026amp; torque\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSound\u003c\/td\u003e\n\u003ctd\u003eMuffled, restrictive tone\u003c\/td\u003e\n\u003ctd\u003eDeeper, more aggressive exhaust note\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurability\u003c\/td\u003e\n\u003ctd\u003eBrittle, prone to cracking under thermal stress\u003c\/td\u003e\n\u003ctd\u003eFlexible, resists fatigue from heat cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eHeavy cast iron\u003c\/td\u003e\n\u003ctd\u003eLighter stainless steel construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cb\u003eThe Bottom Line:\u003c\/b\u003e Factory cast-iron manifolds on older trucks are known to crack and warp over time. Upgrading to stainless steel long tube headers provides improved exhaust flow, better sound, and long-lasting durability for both daily driving and performance applications.\u003c\/p\u003e\n\u003c!-- H2: Installation Notes --\u003e\n\u003ch2\u003e\u003cb\u003eInstallation Notes\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eProfessional installation is strongly recommended for optimal results. Here are important considerations for your SBC headers installation:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSpark Plug Clearance:\u003c\/b\u003e Must use short-thread spark plugs (Accel 0576S or 0414S) and plug wire heat shields. Standard spark plugs will cause interference issues. Angled spark plug cylinder heads (1973-1987 models) may require additional heat shield modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePre-Fit Before Installation:\u003c\/b\u003e Test-fit the headers before final installation. This helps identify any clearance issues with steering components, firewall, or frame rails.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTorque Specifications:\u003c\/b\u003e Use a torque wrench and tighten bolts to 25-30 ft-lbs per bolt for optimal sealing with the 5\/16\" flanges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGasket Installation:\u003c\/b\u003e Apply high-temperature silicone to gaskets on both sides before installation. Allow to slightly dry before final tightening. Consider upgrading to Fel-Pro Performance gaskets for the best results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRe-Torquing:\u003c\/b\u003e After installation, re-torque all bolts after the first heat cycle and continue checking monthly until bolts no longer loosen.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSpark Plug Wire Routing:\u003c\/b\u003e Replace factory wires with 90-degree boots to keep wires away from hot header tubes. Use wire looms and heat sleeves for additional protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003cp\u003e\u003cb\u003ePro Tip:\u003c\/b\u003e Many experienced installers recommend using studs with copper lock nuts instead of bolts for the header-to-head connection. This provides more consistent clamping force and makes future header removal much easier. Source: GM Square Body Truck Forum installation discussions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H3: What's Included --\u003e\n\u003ch3\u003e\u003cb\u003eWhat's Included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Driver Side Long Tube Header\u003c\/li\u003e\n\u003cli\u003e1x Passenger Side Long Tube Header\u003c\/li\u003e\n\u003cli\u003eExhaust Gasket Set\u003c\/li\u003e\n\u003cli\u003eMounting Bolts \u0026amp; Hardware Kit\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AMVirtuo","offers":[{"title":"Default Title","offer_id":48133561188452,"sku":"AM-33026","price":239.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/1889\/8276\/files\/1_360d5c22-e573-4547-97be-59a9d6c4a310.jpg?v=1775467358","url":"https:\/\/avomotor.com\/products\/amvirtuo-long-tube-headers-chevy-gmc-c10-k10-283-400","provider":"AMVirtuo MOTOR","version":"1.0","type":"link"}