Automotive Industry
Automotive Industry Overview
The automotive industry requires metal pipe fittings with high precision, mechanical strength, and corrosion resistance, widely used in engine intake systems, exhaust systems, fuel delivery systems, cooling lines, and truck chassis applications.
With the rapid development of automotive engineering, including electric vehicles (EVs) and new energy vehicles, precision tubing and mandrel-bent components play an increasingly critical role. PINO Metal specializes in custom mandrel bends and high-performance metal tubing for automotive OEMs and Tier 1 suppliers, supporting demanding requirements in exhaust routing, fuel supply, powertrain, and thermal management systems.
High-Precision Mandrel Bending
Wrinkle-Free, Tight-Radius Forming. Our mandrel bending process support preserves tube cross-section and wall thickness. This technology enables smooth, wrinkle-free bends even at tight radii and large bending angles, ensuring excellent roundness and dimensional accuracy.
Advanced Tooling & Die Control System
Precision mandrel bending relies on a complete tooling system. Our bend dies, pressure dies, wiper dies, and multi-link mandrels prevent wrinkling, flattening, and surface damage, optimized for different tube diameters, materials, and bend radii, ensuring consistent bend quality and repeatability across production batches.
CNC-Controlled & Multi Bending Processes
With programmable angles, spacing, and rotation, we ensure consistent, repeatable bends. Capabilities include Rotary Draw (mandrel), Roll, Stretch, and Induction Bending, handling tight to large-radius bends, various materials and complex tube structures.
Core Technologies
Application Node
Exhaust System Tubing
Exhaust System Tubing:
Mandrel bent tubing is a key component in vehicle exhaust systems, supporting efficient exhaust flow, precise installation, and long service life. These pipes are widely used in exhaust headers, downpipes, tailpipes, exhaust elbows, and muffler connections for gasoline and diesel passenger vehicles.
Engineering Advantages:
Mandrel bending maintains a constant inner diameter through each bend, minimizing flow restriction and back pressure. This improves engine efficiency, supports emission control, and helps manage exhaust noise, especially in modern vehicles with compact layouts and complex exhaust routing.
Manufacturing Requirements:
• high dimensional accuracy
• controlled wall thinning
• excellent repeatability
Common materials include:
* stainless steel (304 / 409)
* aluminized steel
* carbon steel
* titanium
* Surface finishes including raw, brushed, polished, anodized or coated depending on functional and aesthetic requirements.
Custom Exhaust Solutions:
Custom mandrel bent exhaust tubing supports flexible designs for single and dual exhaust systems, ensuring consistent quality for both OEM production and aftermarket automotive exhaust components.
Intake & Turbo System Tubing
Intake & Turbo System Tubing:
Mandrel bent intake and turbo tubing ensures smooth, high‑volume airflow for maximum combustion and turbo performance. Ideal for intercooler pipes, charge air tubes, and turbo connections in gas and diesel vehicles. Precision‑engineered for OEM, aftermarket, and high‑performance applications.
Engineering Advantages:
• Mandrel bending maintains a consistent inner diameter, reducing airflow restrictions and pressure drop.
• Optimizes engine power, turbo response, and fuel efficiency.
• Supports complex routing in tight engine bays, including multi-angle bends for turbocharged and supercharged systems.
• Compatible with both standard and high-performance intake systems, including intercoolers and charge air piping.
Manufacturing Requirements:
• Intake and turbo tubing must meet strict standards for flow, fitment, and durability:
• High dimensional accuracy – ensures precise fit to turbo, intercooler, and intake manifolds
• Smooth inner surface finish – reduces turbulence and improves airflow efficiency
• Repeatable bending quality – essential for consistent production in OEM and aftermarket runs
Common materials:
• Aluminum (lightweight, corrosion-resistant)
• Stainless steel (high temperature and durable)
• Carbon steel (for structural or cost-effective applications)
• Surface finishes: polished, brushed, raw, or coated depending on functional and aesthetic requirements.
Custom Intake Solutions:
• Custom mandrel bent intake and turbo tubing supports unique engine layouts and performance upgrades.
• Enables single or multi-turbo setups with complex routing while maintaining precise airflow characteristics.
• Ideal for OEM production, performance aftermarket, and racing applications, ensuring both efficiency and reliability.
Cooling System Tubing
Cooling System Tubing:
Mandrel bent cooling system tubing is a crucial component for managing engine and component temperatures, ensuring reliable performance under varying operating conditions. These tubes are commonly used in radiator connections, coolant lines, heater hoses, and engine cooling circuits for both gasoline and diesel vehicles. Our precision tubing solutions provide OEM-level quality and aftermarket flexibility, ensuring leak-free, efficient cooling system operation and long-term durability.
Engineering Advantages:
• Mandrel bending maintains a consistent inner diameter, preventing flow restriction and turbulence.
• Supports optimal coolant flow, engine temperature regulation, and overall vehicle reliability.
• Enables tight-radius and complex routing for compact engine bays and high-density layouts.
• Compatible with high-pressure and high-temperature cooling systems, including radiator and heater circuits.
Manufacturing Requirements:
• Cooling system tubing must meet strict standards for durability, pressure resistance, and fitment.
• Precise dimensional accuracy – ensures tight fit with radiators, pumps, and connectors.
• Smooth inner surfaces – reduces flow turbulence for maximum cooling efficiency.
• Repeatable bending quality – guarantees consistent performance across production batches.
Common materials:
• Aluminum (lightweight, corrosion-resistant)
• Stainless steel (high temperature and long-term durability)
• Copper (excellent thermal conductivity)
• Surface finishes: raw, polished, brushed, or coated depending on functional and aesthetic needs.
Custom Cooling Solutions:
• Custom mandrel bent cooling tubing supports unique engine layouts and specialized cooling systems.
• Can be tailored for radiator, heater, transmission, and auxiliary cooling circuits.
• Suitable for OEM production, aftermarket upgrades, and high-performance vehicles, ensuring reliable fluid transfer and temperature control.
Fuel & Emission System Tubing
Fuel & Emission System Tubing:
Mandrel bent fuel and emission system tubing is a vital component for safe, efficient, and reliable fuel delivery and emission control in modern vehicles. These tubes are widely used in high-pressure fuel lines, fuel rails, evaporative emission control systems, and EGR (Exhaust Gas Recirculation) piping for gasoline and diesel vehicles. Our precision tubing solutions meet stringent OEM standards and support aftermarket performance upgrades, ensuring leak-free operation, corrosion resistance, and long-term durability.
Engineering Advantages:
• Maintains consistent inner diameter to ensure smooth fuel flow and accurate pressure control.
• Optimized for high-pressure fuel delivery and emission gas routing, improving engine performance and regulatory compliance.
• Supports tight-radius bends and complex routing for compact engine layouts.
• Compatible with modern emission systems, including EGR, vapor recovery, and evaporative control components.
Manufacturing Requirements:
• Fuel and emission system tubing must meet strict requirements for safety, precision, and durability:
• High dimensional accuracy – ensures perfect fit with fuel rails, pumps, and emission components
• Smooth internal surfaces – reduces turbulence and pressure loss for accurate fluid delivery
• Controlled wall thickness – prevents leaks under high-pressure conditions
• Repeatable bending quality – ensures consistent performance across production batches
Common materials:
• Stainless steel (high corrosion and pressure resistance)
• Alloy steel (for high-pressure applications)
• Aluminum (lightweight, corrosion-resistant for low-pressure fuel lines)
• Surface finishes: raw, polished, brushed, or coated depending on functional requirements.
Custom Fuel & Emission Solutions:
• Custom mandrel bent tubing supports unique fuel system layouts and emission control designs.
• Ideal for high-pressure common-rail systems, vapor recovery lines, and EGR tubing.
• Suitable for OEM production, aftermarket upgrades, and high-performance vehicles, ensuring safe, reliable operation under demanding conditions.
Auxiliary System Tubing
Auxiliary Automotive System Tubing:
Mandrel bent auxiliary system tubing supports critical secondary vehicle systems that ensure safety, comfort, and functionality. These tubes are commonly used in brake lines, hydraulic circuits, HVAC refrigerant lines, crankcase ventilation, and transmission cooling systems. Our precision tubing solutions provide OEM-level quality and aftermarket flexibility, ensuring leak-free operation, durability, and reliable performance in diverse automotive applications.
Engineering Advantages:
• Maintains consistent inner diameter to ensure smooth fluid flow and system efficiency.
• Supports high-pressure and high-temperature applications, including hydraulic and brake systems.
• Enables tight-radius and complex routing for compact engine bays and constrained vehicle layouts.
• Compatible with a wide range of secondary automotive systems, improving vehicle reliability and safety.
Manufacturing Requirements:
• Auxiliary system tubing must meet strict standards for durability, pressure resistance, and precise fitment:
• High dimensional accuracy – ensures proper fit with hydraulic pumps, brake calipers, HVAC units, and transmission coolers
• Smooth internal surfaces – reduces turbulence and ensures reliable fluid or gas flow
• Controlled wall thickness – prevents leaks and withstands high pressures
• Repeatable bending quality – guarantees consistent performance across production batches
Common materials:
• Stainless steel (high-pressure and corrosion-resistant applications)
• Aluminum (lightweight and corrosion-resistant)
• Carbon steel (structural or cost-effective applications)
• Surface finishes: raw, polished, brushed, or coated depending on functional requirements.
Custom Auxiliary Solutions:
• Custom mandrel bent tubing supports complex routing for brake, HVAC, hydraulic, and transmission systems.
• Ideal for OEM production, aftermarket upgrades, and high-performance vehicles, ensuring safety and operational reliability.
• Supports tight spaces and multi-angle bends, making installation easier while maintaining system integrity.