{"product_id":"dougs-tri-y-header-63-91-gm-truck-265-400-sbc-2-4-wd-1-5-8-2-primary-2-1-2-collector-304-stainless-d300y-ss","title":"Doug's Headers Doug's Tri Y Header 63-91 GM Truck 265-400  SBC 2 \u0026 4 WD 1 5\/8-2\" Primary 2 1\/2\" Collector 304 Stainless D300Y-SS","description":"\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\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNatural stainless-steel finish offers superior resistance to rust and corrosion\u003c\/li\u003e\n\u003cli\u003e3\/8\" thick 304 stainless machine flanges to prevent warping\u003c\/li\u003e\n\u003cli\u003eCNC 304 stainless mandrel bent tubes for an accurate fit and improved flow\u003c\/li\u003e\n\u003cli\u003ePrecision formed long transition collectors and long tube design reduce backpressure and increase higher RPM horsepower\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollector Attachment:\u003c\/strong\u003e 3-Bolt Flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollector Diameter:\u003c\/strong\u003e 2.5 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollector Port Diameter:\u003c\/strong\u003e 2.5 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Head Port Shape:\u003c\/strong\u003e Oval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Full-length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEGT Port:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmissionFullDES:\u003c\/strong\u003e 3 - This 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\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e 304 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Thickness:\u003c\/strong\u003e 0.375 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Or Seal Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGaskets Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade Type:\u003c\/strong\u003e Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader Material:\u003c\/strong\u003e 304 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeader Style:\u003c\/strong\u003e Full-length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOxygen Sensor Port:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Shape:\u003c\/strong\u003e Oval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Tube Outside Diameter:\u003c\/strong\u003e 1.625 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Tubing Diameter:\u003c\/strong\u003e 1.625 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheen Level:\u003c\/strong\u003e Satin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Wall Thickness:\u003c\/strong\u003e 16 ga.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Doug's Headers","offers":[{"title":"Default Title","offer_id":45520496590983,"sku":"DOUD300Y-SS","price":1338.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/4008\/1543\/files\/D303Y-SS_68d9e60e-81f4-4411-8205-8738b1b88b9c.jpg?v=1788268465","url":"https:\/\/checkout.northernperformance.ca\/products\/dougs-tri-y-header-63-91-gm-truck-265-400-sbc-2-4-wd-1-5-8-2-primary-2-1-2-collector-304-stainless-d300y-ss","provider":"Northern Performance","version":"1.0","type":"link"}