{"product_id":"gm-3-5l-vortec-3500-manifold-flange-304-ss","title":"GM 3.5L Vortec 3500\/3700 Manifold Flange (304 SS)","description":"\u003ch3 data-end=\"502\" data-start=\"187\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003eNOW AVAILABLE! Limited supply! \u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"187\" data-end=\"502\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"187\" data-end=\"502\"\u003eBuilding a turbo setup or custom header for the GM Atlas 3500\/3700 inline-5 (3.5L platform) starts with a solid flange. This is a raw, weld-ready exhaust manifold flange cut from 1\/2\" thick 304 stainless steel and left in a mill finish so you can port, match, and surface it exactly how your build needs.\u003c\/p\u003e\n\u003chr data-start=\"504\" data-end=\"507\"\u003e\n\u003ch2 data-start=\"509\" data-end=\"520\"\u003eFeatures\u003c\/h2\u003e\n\u003cul data-start=\"521\" data-end=\"910\"\u003e\n\u003cli data-start=\"521\" data-end=\"599\"\u003e\n\u003cp data-start=\"523\" data-end=\"599\"\u003e\u003cstrong data-start=\"523\" data-end=\"539\"\u003eApplication:\u003c\/strong\u003e GM Atlas 3500\/3700 Inline-5 (3.5L) exhaust\/manifold builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"600\" data-end=\"641\"\u003e\n\u003cp data-start=\"602\" data-end=\"641\"\u003e\u003cstrong data-start=\"602\" data-end=\"615\"\u003eMaterial:\u003c\/strong\u003e 304 stainless steel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"642\" data-end=\"679\"\u003e\n\u003cp data-start=\"644\" data-end=\"679\"\u003e\u003cstrong data-start=\"644\" data-end=\"658\"\u003eThickness:\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"680\" data-end=\"726\"\u003e\n\u003cp data-start=\"682\" data-end=\"726\"\u003e\u003cstrong data-start=\"682\" data-end=\"693\"\u003eFinish:\u003c\/strong\u003e Raw mill finish (uncoated)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"727\" data-end=\"771\"\u003e\n\u003cp data-start=\"729\" data-end=\"771\"\u003e\u003cstrong data-start=\"729\" data-end=\"745\"\u003eCut Process:\u003c\/strong\u003e Precision laser cut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"772\" data-end=\"850\"\u003e\n\u003cp data-start=\"774\" data-end=\"850\"\u003e\u003cstrong data-start=\"774\" data-end=\"788\"\u003eUse Cases:\u003c\/strong\u003e Turbo manifolds, NA headers, custom downpipes, fab projects\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"851\" data-end=\"910\"\u003e\n\u003cp data-start=\"853\" data-end=\"910\"\u003e\u003cstrong data-start=\"853\" data-end=\"868\"\u003eWeld-Ready:\u003c\/strong\u003e Ideal for TIG\/MIG stainless fabrication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"912\" data-end=\"915\"\u003e\n\u003ch2 data-start=\"917\" data-end=\"938\"\u003eWhy 304 Stainless?\u003c\/h2\u003e\n\u003cp data-start=\"940\" data-end=\"991\"\u003e304 is a proven exhaust material because it offers:\u003c\/p\u003e\n\u003cul data-start=\"993\" data-end=\"1190\"\u003e\n\u003cli data-start=\"993\" data-end=\"1059\"\u003e\n\u003cp data-start=\"995\" data-end=\"1059\"\u003e\u003cstrong data-start=\"995\" data-end=\"1026\"\u003eStrong corrosion resistance\u003c\/strong\u003e for street and performance use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1060\" data-end=\"1124\"\u003e\n\u003cp data-start=\"1062\" data-end=\"1124\"\u003e\u003cstrong data-start=\"1062\" data-end=\"1091\"\u003eGood high-temp durability\u003c\/strong\u003e for manifolds and turbo setups\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1125\" data-end=\"1190\"\u003e\n\u003cp data-start=\"1127\" data-end=\"1190\"\u003e\u003cstrong data-start=\"1127\" data-end=\"1152\"\u003eExcellent weldability\u003c\/strong\u003e with common stainless filler metals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1192\" data-end=\"1195\"\u003e\n\u003ch2 data-start=\"1197\" data-end=\"1240\"\u003eImportant Note on Flatness (Please Read)\u003c\/h2\u003e\n\u003cp data-start=\"1242\" data-end=\"1447\"\u003eThese flanges \u003cstrong data-start=\"1256\" data-end=\"1293\"\u003edo arrive with a slight bow\/warp.\u003c\/strong\u003e\u003cbr data-start=\"1293\" data-end=\"1296\"\u003eThat’s normal for \u003cstrong data-start=\"1314\" data-end=\"1342\"\u003elaser-cut 1\/2\" stainless\u003c\/strong\u003e — the cutting heat can introduce mild movement. This is common across the industry and \u003cstrong data-start=\"1430\" data-end=\"1447\"\u003enot a defect.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1449\" data-end=\"1552\"\u003eAfter welding, flanges should be surfaced flat to guarantee sealing. We recommend one of the following:\u003c\/p\u003e\n\u003cul data-start=\"1554\" data-end=\"1672\"\u003e\n\u003cli data-start=\"1554\" data-end=\"1605\"\u003e\n\u003cp data-start=\"1556\" data-end=\"1605\"\u003e\u003cstrong data-start=\"1556\" data-end=\"1575\"\u003eBlock sand flat\u003c\/strong\u003e on a known-flat surface, or\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1606\" data-end=\"1672\"\u003e\n\u003cp data-start=\"1608\" data-end=\"1672\"\u003e\u003cstrong data-start=\"1608\" data-end=\"1630\"\u003eMachine\/plane flat\u003c\/strong\u003e (best for high-boost or high-heat builds)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1674\" data-end=\"1791\"\u003eWelding heat can add a bit more movement, so \u003cstrong data-start=\"1719\" data-end=\"1759\"\u003efinal surfacing is standard practice\u003c\/strong\u003e on performance manifold builds.\u003c\/p\u003e","brand":"Foreverfabrication","offers":[{"title":"Default Title","offer_id":46013334028477,"sku":"FF-AT-35-MF-SS50","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1254\/5501\/files\/3700_Header_flange_2.png?v=1765733426","url":"https:\/\/shop.foreverfabrication.com\/products\/gm-3-5l-vortec-3500-manifold-flange-304-ss","provider":"Foreverfabrication","version":"1.0","type":"link"}