{"product_id":"tri-y-headers-for-55-57-chevy-265-400-sbc-1-5-8in-primary-ceramic-coated-d357y","title":"Tri-Y Headers for 55-57 Chevy 265-400 SBC 1-5\/8in Primary Ceramic Coated D357Y","description":"\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e55-57 Chevy 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. \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 55-57 Chevy 265-400 SBC 1 5\/8-2\" Primary 2 1\/2\" Collector Silver Ceramic Coated D357Y\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\u003eD357Y\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1955-1957 Chevrolet One-Fifty Series 265 CID\u003c\/li\u003e\n\u003cli\u003e1957-1957 Chevrolet One-Fifty Series 283 CID\u003c\/li\u003e\n\u003cli\u003e1955-1957 Chevrolet Two-Ten Series 265 CID\u003c\/li\u003e\n\u003cli\u003e1957-1957 Chevrolet Two-Ten Series 283 CID\u003c\/li\u003e\n\u003cli\u003e1955-1957 Chevrolet Sedan Delivery 265 CID\u003c\/li\u003e\n\u003cli\u003e1957-1957 Chevrolet Sedan Delivery 283 CID\u003c\/li\u003e\n\u003cli\u003e1955-1957 Chevrolet Bel Air 265 CID\u003c\/li\u003e\n\u003cli\u003e1957-1957 Chevrolet Bel Air 283 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 use on Pre-Pollution Controlled Vehicles. It is legal for use on all vehicles produced Before Emissions Control Regulations were imposed. These are considered Uncontrolled Vehicles and are defined as follows\u003cul\u003e\n\u003cli\u003e1965 and Older US Manufactured California Certified Vehicles\u003c\/li\u003e\n\u003cli\u003e1967 and Older US Manufactured Federally Certified Vehicles\u003c\/li\u003e\n\u003cli\u003e1967 and Older Foreign Manufactured Vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\/1026bc84415dee381f44779398073adc.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\u003eWill not fit if engine is located more than 3\/4 inch forward for HEI firewall clearance.  Fits with Trans Dapt PN 4195 or 4177, Danchuck PN 871, 12184, 17756, 17757, and 16339 or equivalent\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\u003eOriginal bellhousing frame mounts must be removed.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Doug's Headers","offers":[{"title":"Default Title","offer_id":54508691161301,"sku":"D357Y-BKLK","price":1004.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2493\/0960\/files\/dfce47690af8e121f32682855c179cf6.jpg?v=1786704552","url":"https:\/\/moderndaymuffler.com\/products\/tri-y-headers-for-55-57-chevy-265-400-sbc-1-5-8in-primary-ceramic-coated-d357y","provider":"Modern Day Muffler","version":"1.0","type":"link"}