Tongze 4" SS304 90° Stainless Steel Exhaust Elbow Pipe, Mandrel-Bent Polished 4-Pack, 1.2mm Wall

Tongze 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.

These 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.

How will this elbow improve a custom car exhaust layout?

The 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.

• Mandrel bending keeps the pipe’s internal diameter consistent for smoother flow.
• Polished SS304 surface simplifies welding and reduces post-weld finishing time.
• 1.2 mm wall thickness balances rigidity with ease of handling for DIY work.
• Four elbows per pack allow multi-point routing or spare parts for future mods.

What materials and construction details matter for durability?

Tongze 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.

• SS304 resists rust and oxidation in high-temperature environments.
• Mandrel bending minimizes thinning at the curve for extended life.
• Polished finish provides a smoother exterior that resists grime buildup.
• Consistent 1.2 mm thickness gives reliable welding margins without excessive weight.

How easy is it to install and combine with other system parts?

These 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.

• 4" nominal diameter matches many aftermarket exhaust fittings and adapters.
• Smooth cut ends ease tack welds and alignment during fabrication.
• Supplied as a set of four so you can route multiple turns or keep spares.
• Suitable for welding, clamping, or flange adapters with simple preparation.

What should I check before ordering to ensure compatibility?

Confirm 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.

• Measure existing piping and mating components to verify a 4" fit.
• Check clearance around bends for heat and mechanical interference.
• Confirm SS304 and 1.2 mm thickness fit your durability expectations.
• Plan for welding or clamping method prior to installation.

Who 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.