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2 1/4 Inch Stainless Steel Exhaust Flex Pipe for Cars, Trucks & Generators
| Application Scenarios: The 2 1/4 inch flex pipe fits passenger cars, light trucks, diesel generators and compact industrial engines where medium exhaust flow requires vibration isolation and thermal expansion compensation to protect turbochargers, catalytic converters and downstream pipework. Manufacturing Processes: Assembly uses a stamped cap, inner interlock liner, multi-ply stainless bellows and an outer braid. Components are TIG/MIG/Laser welded as required, with dimensional checks, leak tests and braid integrity inspection to ensure stable performance under thermal cycling. Features: Interlock liner smooths gas flow and shields the bellows from pulsation and particle impact; outer braid restrains axial growth while allowing flexibility; stainless options provide strong corrosion resistance; the cap design improves end-load capability for OEM-level durability. Customization: Diameters, effective length, braid style, ply count, end caps and materials are configurable. Options include aluminized steel caps for cost control, and 304/321/409/201 stainless combinations to balance heat resistance, corrosion performance and budget. | |||||||||
Product Introduction
The 2 1/4 inch exhaust flex pipe is designed for automotive, light truck, generator and compact industrial engine exhaust systems. It adopts a proven Cap + Interlock + Bellows + Outer Braid structure (K1 type) to effectively absorb engine vibration, compensate for thermal expansion, and reduce noise & harshness while protecting catalytic converters, turbochargers, and downstream exhaust components.
Optional materials include aluminized steel, stainless steel 201, 304, 321, 409, which can be selected based on cost, corrosion resistance, and heat tolerance requirements. The inner interlock liner improves exhaust gas flow and shields the bellows from direct pulsation and particle erosion. The outer stainless braid provides axial restraint and durability under continuous vibration and thermal cycling, making it compatible with both gasoline and diesel exhaust systems.
Typical installation positions are between the manifold/turbo outlet and downstream exhaust piping. When installing, ensure straight alignment, avoid torsional stress, and maintain sufficient clearance so the bellows can flex freely. The product can be connected by welding or clamping depending on the exhaust system design. It is recommended to support adjacent pipes properly to prevent the flex pipe from bearing the full weight of the exhaust system.
Packing follows high-quality plastic bag inside + carton box outside, with palletized shipment available for bulk orders. Customized labels, barcodes, and packaging styles can be provided for distributors and OEM customers. Global delivery covers air courier (DHL, FedEx, UPS, TNT, EMS), air freight, and sea freight. With automated production lines and strict QC, monthly output capacity reaches 350,000 pcs, ensuring reliable supply for OEM, aftermarket, and wholesale customers.
Technical Specifications
| Nominal Diameter | 2 1/4 inch (57 mm) |
|---|---|
| Structure | Cap + Interlock Liner + Multi-ply Bellows + Outer Braid |
| Available Materials | Aluminized Steel; Stainless 201 / 304 / 321 / 409 |
| Typical Lengths | 6–12 inch effective length (customizable) |
| End Options | Plain cap, beveled, flanged; custom end-forms on request |
| Testing | Dimensional, leak, and braid integrity inspection |
| Monthly Output | 350,000 pcs (combined flex assemblies) |
| Packing | Plastic bag inner + carton outer; palletized for export |
| Delivery | DHL / FedEx / UPS / TNT / EMS; air or sea freight |
FAQ
Q1: Which material pairing is most common for automotive use?
For balanced performance, many OEM-style builds use 304 interlock + 304 bellows + 304 braid with 409 or aluminized steel caps for cost efficiency.
Q2: Can you supply components separately (cap, interlock, bellows, braid)?
Yes. We offer full assemblies or individual components for repair and assembly lines.
Q3: What information do you need to quote an OEM project?
Nominal ID/OD, effective length, braid type, liner requirement, end form, target material, drawing or sample, and annual volume/PPAP or documentation requirements.
Q4: What payment methods are available?
PayPal, T/T bank transfer, Visa/Mastercard, and Western Union. Credit terms can be discussed for long-term partners.
Q5: How do you ensure consistency at high volume?
Automated forming/welding, incoming material checks (MTC), in-process leak tests and final inspections. Lot traceability and customized packing labels are available.
YUEDING EXHAUST
Professional manufacturing of stainless steel exhaust flexible connection components, certified under ISO and IATF systems, with stable exports to more than 100 countries, batch production combined with standard size stock, supporting detail and packaging customization, aiming to provide you with a more efficient and more predictable integrated supply solution.
Reliable Delivery
Not just speed, but stable production planning, inventory, and batch shipping, ensuring consistent delivery.
Factory Direct
Production, inspection, and packaging are integrated, with drawings going directly into production, making cost and process more transparent.
One-Stop
One system covers flex pipes, clamps, and related products, reducing switching and simplifying the process from samples to mass production.
