{"product_id":"long-tube-headers-for-73-91-gm-truck-265-400-sbc-2wd-1-5-8in-primary-d310","title":"Long Tube Headers for 73-91 GM Truck 265-400 SBC 2WD 1-5\/8in Primary D310","description":"\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e73-91 GM Truck SBC Long Tube Silver Ctd \u003c\/p\u003e\u003cp\u003eLong tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e3\/8\" Thick machined flanges to prevent warping\u003c\/li\u003e\n\u003cli\u003ePrecision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower\u003c\/li\u003e\n\u003cli\u003eHeavy duty 16-gauge tubing for long life\u003c\/li\u003e\n\u003cli\u003eTubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand: \u003c\/strong\u003eDoug's Headers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollector Attachment: \u003c\/strong\u003e3-Bolt Flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollector Diameter: \u003c\/strong\u003e3.0 IN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollector Port Diameter: \u003c\/strong\u003e3.0 IN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor: \u003c\/strong\u003eSilver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Head Port Shape: \u003c\/strong\u003eOval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign: \u003c\/strong\u003eFull-length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEGT Port: \u003c\/strong\u003eNo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish: \u003c\/strong\u003eMetallic Ceramic Coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Thickness: \u003c\/strong\u003e0.375 IN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Or Seal Included: \u003c\/strong\u003eYes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGaskets Included: \u003c\/strong\u003eYes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade Type: \u003c\/strong\u003ePerformance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader Material: \u003c\/strong\u003eSteel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader Style: \u003c\/strong\u003eFull-length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial: \u003c\/strong\u003eSteel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware Included: \u003c\/strong\u003eYes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOxygen Sensor Port: \u003c\/strong\u003eNo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Shape: \u003c\/strong\u003eOval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Tube Outside Diameter: \u003c\/strong\u003e1.625 IN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Tubing Diameter: \u003c\/strong\u003e1.625 IN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProp 65 (C, R or CR): \u003c\/strong\u003eCR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProp 65 Yes\/No: \u003c\/strong\u003eYes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheen Level: \u003c\/strong\u003eSemi-Gloss\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitle: \u003c\/strong\u003eDoug's Long Tube Header 73-91 GM Truck 265-400 SBC 2WD 1 5\/8\" Primary 3\" Collector Silver Ceramic Coated D310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Wall Thickness: \u003c\/strong\u003e16 GU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number: \u003c\/strong\u003eD310\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1973-1974 Chevrolet C10 Pickup 350 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 Chevrolet C10 Pickup 307 CID\u003c\/li\u003e\n\u003cli\u003e1973-1991 Chevrolet Blazer 350 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 Chevrolet Blazer 307 CID\u003c\/li\u003e\n\u003cli\u003e1987-1987 Chevrolet Blazer 305 CID\u003c\/li\u003e\n\u003cli\u003e1975-1986 Chevrolet K5 Blazer 350 CID\u003c\/li\u003e\n\u003cli\u003e1975-1979 Chevrolet K5 Blazer 400 CID\u003c\/li\u003e\n\u003cli\u003e1977-1986 Chevrolet K5 Blazer 305 CID\u003c\/li\u003e\n\u003cli\u003e1975-1986 Chevrolet C10 350 CID\u003c\/li\u003e\n\u003cli\u003e1976-1980 Chevrolet C10 400 CID\u003c\/li\u003e\n\u003cli\u003e1977-1986 Chevrolet C10 305 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 Chevrolet C10 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1975-1986 Chevrolet C10 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1977-1986 Chevrolet C10 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1975-1987 Chevrolet C20 350 CID\u003c\/li\u003e\n\u003cli\u003e1976-1980 Chevrolet C20 400 CID\u003c\/li\u003e\n\u003cli\u003e1977-1986 Chevrolet C20 305 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 Chevrolet C20 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1975-1986 Chevrolet C20 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1976-1980 Chevrolet C20 Suburban 400 CID\u003c\/li\u003e\n\u003cli\u003e1977-1986 Chevrolet C20 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 Chevrolet K10 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 Chevrolet K20 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1987-1988 Chevrolet R10 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1987-1987 Chevrolet R10 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1989-1991 Chevrolet R1500 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1987-1988 Chevrolet R20 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1989-1991 Chevrolet R2500 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 GMC C15\/C1500 Pickup 307 CID\u003c\/li\u003e\n\u003cli\u003e1973-1974 GMC C15\/C1500 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1973-1974 GMC C25\/C2500 Pickup 307 CID\u003c\/li\u003e\n\u003cli\u003e1973-1974 GMC C25\/C2500 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 GMC K15\/K1500 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 GMC K25\/K2500 Suburban 307 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C1500 305 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C1500 350 CID\u003c\/li\u003e\n\u003cli\u003e1979-1980 GMC C1500 400 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C1500 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C1500 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C2500 305 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C2500 350 CID\u003c\/li\u003e\n\u003cli\u003e1979-1979 GMC C2500 400 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C2500 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1980-1980 GMC C2500 Suburban 400 CID\u003c\/li\u003e\n\u003cli\u003e1982-1986 GMC C2500 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1979-1986 GMC C3500 350 CID\u003c\/li\u003e\n\u003cli\u003e1979-1979 GMC C3500 400 CID\u003c\/li\u003e\n\u003cli\u003e1986-1986 GMC C3500 305 CID\u003c\/li\u003e\n\u003cli\u003e1987-1991 GMC R1500 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1987-1987 GMC R1500 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1987-1989 GMC R2500 350 CID\u003c\/li\u003e\n\u003cli\u003e1987-1987 GMC R2500 305 CID\u003c\/li\u003e\n\u003cli\u003e1987-1991 GMC R2500 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1987-1991 GMC R3500 350 CID\u003c\/li\u003e\n\u003cli\u003e1975-1978 GMC C15 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1977-1978 GMC C15 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1975-1978 GMC C25 Suburban 350 CID\u003c\/li\u003e\n\u003cli\u003e1977-1978 GMC C25 Suburban 305 CID\u003c\/li\u003e\n\u003cli\u003e1978-1978 GMC C25 Suburban 400 CID\u003c\/li\u003e\n\u003cli\u003e1975-1984 GMC Jimmy 350 CID\u003c\/li\u003e\n\u003cli\u003e1975-1979 GMC Jimmy 400 CID\u003c\/li\u003e\n\u003cli\u003e1977-1984 GMC Jimmy 305 CID\u003c\/li\u003e\n\u003cli\u003e1987-1987 GMC R1500 305 CID\u003c\/li\u003e\n\u003cli\u003e1987-1987 GMC R1500 350 CID\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eEmissions:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eThis Product is LEGAL for Closed Course Competition use or Pre-Emissions Controlled Vehicles ONLY. It is Not Legal for use on any Emissions Controlled Vehicle for Street or Off Highway use.\u003c\/li\u003e \u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstructions:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/prod-da.s3.us-east-2.amazonaws.com\/BHKJ\/32bd00dae4cfa9c8d235134b86332a54.pdf\" target=\"_blank\"\u003eClick here for installation instructions!\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment Notes: \u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFits most angle plug heads.\u003c\/li\u003e\n\u003cli\u003eFits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 and ZZ6 engines.\u003c\/li\u003e\n\u003cli\u003eInstallation requires left side A\/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.\u003c\/li\u003e\n\u003cli\u003ewithout Catalytic Converter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Doug's Headers","offers":[{"title":"Default Title","offer_id":54508692209877,"sku":"D310-BKLK","price":1035.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2493\/0960\/files\/2b9d658709ed2d7da85808acce1ebcb7.jpg?v=1786704767","url":"https:\/\/moderndaymuffler.com\/products\/long-tube-headers-for-73-91-gm-truck-265-400-sbc-2wd-1-5-8in-primary-d310","provider":"Modern Day Muffler","version":"1.0","type":"link"}