{"product_id":"tongze-4-ss304-90-stainless-steel-exhaust-elbow-pipe-mandrel-bent-polished-4-pack-1-2mm-wall","title":"Tongze 4\" SS304 90° Stainless Steel Exhaust Elbow Pipe, Mandrel-Bent Polished 4-Pack, 1.2mm Wall","description":"\u003cp\u003e\u003cstrong\u003eTongze 4-inch SS304 90° stainless steel exhaust elbow pipe — a mandrel-bent, polished elbow kit of four pieces built for custom automotive and industrial exhaust routing.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese 4\" 90° elbows from Tongze are manufactured from corrosion-resistant SS304 stainless steel with a mandrel-bend profile and a 1.2 mm wall thickness, designed to simplify custom exhaust builds, repair projects, marine systems, and general pipe-routing tasks. Each set includes four identical elbow sections, polished for a smooth finish that eases welding and splicing while improving flow compared with crushed bends.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this elbow improve a custom car exhaust layout?\u003c\/h3\u003e\n\u003cp\u003eThe mandrel-bent profile preserves the tube diameter through the curve, reducing turbulence and backpressure compared with a crushed or kinked bend. Its consistent inner radius helps maintain exhaust flow and makes alignment with mufflers, resonators, or straight sections easier during fabrication.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMandrel bending keeps the pipe’s internal diameter consistent for smoother flow.\u003c\/li\u003e\n  \u003cli\u003ePolished SS304 surface simplifies welding and reduces post-weld finishing time.\u003c\/li\u003e\n  \u003cli\u003e1.2 mm wall thickness balances rigidity with ease of handling for DIY work.\u003c\/li\u003e\n  \u003cli\u003eFour elbows per pack allow multi-point routing or spare parts for future mods.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and construction details matter for durability?\u003c\/h3\u003e\n\u003cp\u003eTongze uses SS304 stainless steel, a common grade for exhaust and marine use thanks to its oxidation resistance and mechanical strength. The computerized mandrel-bend process improves structural integrity at the curve and reduces weak points that can develop in crushed bends.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSS304 resists rust and oxidation in high-temperature environments.\u003c\/li\u003e\n  \u003cli\u003eMandrel bending minimizes thinning at the curve for extended life.\u003c\/li\u003e\n  \u003cli\u003ePolished finish provides a smoother exterior that resists grime buildup.\u003c\/li\u003e\n  \u003cli\u003eConsistent 1.2 mm thickness gives reliable welding margins without excessive weight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install and combine with other system parts?\u003c\/h3\u003e\n\u003cp\u003eThese elbows are built for straightforward splicing, welding, or clamped connections in custom systems. The universal 4\" diameter fits common aftermarket components used in cars, small boats, and industrial ducts, while the smooth ends make tack-welding and alignment faster during assembly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e4\" nominal diameter matches many aftermarket exhaust fittings and adapters.\u003c\/li\u003e\n  \u003cli\u003eSmooth cut ends ease tack welds and alignment during fabrication.\u003c\/li\u003e\n  \u003cli\u003eSupplied as a set of four so you can route multiple turns or keep spares.\u003c\/li\u003e\n  \u003cli\u003eSuitable for welding, clamping, or flange adapters with simple preparation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before ordering to ensure compatibility?\u003c\/h3\u003e\n\u003cp\u003eConfirm the 4\" (outer diameter nominal) size and 90° bend meet your routing and clearance needs. Verify material and wall thickness are appropriate for your temperature and vibration conditions, and account for the polished finish if you want a visible exterior section.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeasure existing piping and mating components to verify a 4\" fit.\u003c\/li\u003e\n  \u003cli\u003eCheck clearance around bends for heat and mechanical interference.\u003c\/li\u003e\n  \u003cli\u003eConfirm SS304 and 1.2 mm thickness fit your durability expectations.\u003c\/li\u003e\n  \u003cli\u003ePlan for welding or clamping method prior to installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This Tongze 4\" SS304 90° elbow pack is intended for automotive enthusiasts, custom exhaust fabricators, marine hobbyists, and industrial maintenance professionals who need reliable, mandrel-bent stainless elbows for routing or repair. If you build or modify exhaust systems, stair handrails, sanitary piping, or other tubular assemblies and want consistent bends, corrosion resistance, and easier welding, this four-piece set provides an economical, ready-to-use option. Always double-check dimensions and fitment before purchasing, and if you have specific fit questions, contact the seller with your project details.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these elbows welded or clamped onto existing pipes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They can be welded, clamped, or used with flange adapters; the polished ends make tack-welding straightforward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is SS304 suitable for marine exhaust applications?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: SS304 offers good corrosion resistance for many marine uses, but harsher saltwater environments may prefer higher grades like SS316.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Tongze","offers":[{"title":"Default Title","offer_id":48084178796702,"sku":"B0CZRW2PMT","price":91.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/tongze-front-packaging-4inch-90deg-ss304-elbow.jpg?v=1785848535","url":"https:\/\/northtrailauto.ca\/products\/tongze-4-ss304-90-stainless-steel-exhaust-elbow-pipe-mandrel-bent-polished-4-pack-1-2mm-wall","provider":"North Trail Auto","version":"1.0","type":"link"}