{"product_id":"tri-y-headers-for-65-81-gm-265-400-sbc-1-5-8in-primary-ceramic-coated-d375y","title":"Tri-Y Headers for 65-81 GM 265-400 SBC 1-5\/8in Primary Ceramic Coated D375Y","description":"\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e65-77 Various GM SBC Tri Y Silver Ctd\u003c\/p\u003e\u003cp\u003eDoug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power.  TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency. \r\nThis fitment is tailored for popular aftermarket engine swap kits. Doug's engine swap headers were developed to solve common fitment issues in tight spaces, making your swap process smoother. No more guesswork or modifications needed - just straightforward installations that save you time and frustration.\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\u003eCNC mandrel bent tubes ensure accurate fit and better flow\u003c\/li\u003e\n\u003cli\u003eHeavy 16-guage tubing for longer 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\u003e2.5 IN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollector Port Diameter: \u003c\/strong\u003e2.5 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\u003eTri-Y\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\u003eTri-Y\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 Tri Y Header 65-81 Various GM 265-400 SBC 1 5\/8-2\" Primary 2 1\/2\" Collector Silver Ceramic Coated D375Y\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\u003eD375Y\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1965-1966 Chevrolet C10 Pickup 283 CID\u003c\/li\u003e\n\u003cli\u003e1966-1966 Chevrolet C10 Pickup 327 CID\u003c\/li\u003e\n\u003cli\u003e1965-1966 Chevrolet C20 Pickup 283 CID\u003c\/li\u003e\n\u003cli\u003e1968-1968 Chevrolet Chevy II 307 CID\u003c\/li\u003e\n\u003cli\u003e1968-1968 Chevrolet Chevy II 327 CID\u003c\/li\u003e\n\u003cli\u003e1968-1973 Chevrolet Chevelle 307 CID\u003c\/li\u003e\n\u003cli\u003e1968-1973 Chevrolet Chevelle 350 CID\u003c\/li\u003e\n\u003cli\u003e1968-1968 Chevrolet Chevelle 327 CID\u003c\/li\u003e\n\u003cli\u003e1970-1973 Chevrolet Chevelle 400 CID\u003c\/li\u003e\n\u003cli\u003e1965-1969 Chevrolet Bel Air 327 CID\u003c\/li\u003e\n\u003cli\u003e1965-1967 Chevrolet Bel Air 283 CID\u003c\/li\u003e\n\u003cli\u003e1968-1968 Chevrolet Bel Air 307 CID\u003c\/li\u003e\n\u003cli\u003e1967-1974 Chevrolet Camaro 350 CID\u003c\/li\u003e\n\u003cli\u003e1967-1969 Chevrolet Camaro 302 CID\u003c\/li\u003e\n\u003cli\u003e1969-1973 Chevrolet Camaro 307 CID\u003c\/li\u003e\n\u003cli\u003e1966-1969 Chevrolet Caprice 327 CID\u003c\/li\u003e\n\u003cli\u003e1966-1967 Chevrolet Caprice 283 CID\u003c\/li\u003e\n\u003cli\u003e1968-1973 Chevrolet Caprice 307 CID\u003c\/li\u003e\n\u003cli\u003e1970-1974 Chevrolet Caprice 400 CID\u003c\/li\u003e\n\u003cli\u003e1955-1956 Chevrolet Corvette 265 CID\u003c\/li\u003e\n\u003cli\u003e1957-1961 Chevrolet Corvette 283 CID\u003c\/li\u003e\n\u003cli\u003e1962-1962 Chevrolet Corvette 327 CID\u003c\/li\u003e\n\u003cli\u003e1968-1977 Chevrolet El Camino 350 CID\u003c\/li\u003e\n\u003cli\u003e1968-1973 Chevrolet El Camino 307 CID\u003c\/li\u003e\n\u003cli\u003e1968-1969 Chevrolet El Camino 327 CID\u003c\/li\u003e\n\u003cli\u003e1970-1976 Chevrolet El Camino 400 CID\u003c\/li\u003e\n\u003cli\u003e1976-1977 Chevrolet El Camino 305 CID\u003c\/li\u003e\n\u003cli\u003e1965-1969 Chevrolet Impala 327 CID\u003c\/li\u003e\n\u003cli\u003e1965-1967 Chevrolet Impala 283 CID\u003c\/li\u003e\n\u003cli\u003e1968-1973 Chevrolet Impala 307 CID\u003c\/li\u003e\n\u003cli\u003e1969-1974 Chevrolet Impala 350 CID\u003c\/li\u003e\n\u003cli\u003e1970-1974 Chevrolet Impala 400 CID\u003c\/li\u003e\n\u003cli\u003e1973-1977 Chevrolet Malibu 350 CID\u003c\/li\u003e\n\u003cli\u003e1973-1976 Chevrolet Malibu 400 CID\u003c\/li\u003e\n\u003cli\u003e1973-1973 Chevrolet Malibu 307 CID\u003c\/li\u003e\n\u003cli\u003e1976-1977 Chevrolet Malibu 305 CID\u003c\/li\u003e\n\u003cli\u003e1969-1974 Chevrolet Nova 350 CID\u003c\/li\u003e\n\u003cli\u003e1969-1973 Chevrolet Nova 307 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\/5a23c913706601bcd25c62ee38f64220.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\u003eRequires removal or modification of locking steering columns if equipped.\u003c\/li\u003e\n\u003cli\u003eDoes not fit 67-69 Camaro with A\/C.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Doug's Headers","offers":[{"title":"Default Title","offer_id":54508698206421,"sku":"D375Y-BKLK","price":1035.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2493\/0960\/files\/7253c783a43c6f1708a6ea71b92414b4.jpg?v=1786705246","url":"https:\/\/moderndaymuffler.com\/products\/tri-y-headers-for-65-81-gm-265-400-sbc-1-5-8in-primary-ceramic-coated-d375y","provider":"Modern Day Muffler","version":"1.0","type":"link"}