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Exhaust Nuts / Bolts / Studs

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61621190300
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Set of fastening parts for Heat exchanger for subsequent installation.

Fits:
Porsche 356 B / C 1960-65

Click 'Zoom in' for large parts diagram.
Diagram ref no 17

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61621190300
61621190300

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61621124000/1
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Support for Heat Exchanger

OE Match replacement heat exchanger support for Porsche 356B and 356C models, designed to provide support for the original engine heating system components.

Fits:

  • Porsche 356B 1959-63
  • Porsche 356C 1963-65

Diagram ref no 19

The Porsche 356 uses engine-generated heat to supply warm air to the passenger compartment. The heat exchangers form an important part of this system, and their associated supports help maintain correct positioning and secure installation.

This original-style replacement is ideal for repairing damaged, corroded or missing supports during classic Porsche restoration or heating system maintenance.

What Does the Heat Exchanger Support Do?

The support helps secure and position the heat exchanger assembly, maintaining stability and reducing unwanted movement or vibration.

Correct support is important for keeping the heating components properly aligned and preventing unnecessary stress on adjacent parts.

Why Does It Fail?

Over time, exposure to engine heat, moisture, road dirt and corrosion can weaken the original support.

Common problems include rust, distortion, fatigue cracking and damage caused during exhaust or heating system removal.

When Should It Be Replaced?

Replacement is recommended when the original support is:

Corroded, cracked or weakened Bent or distorted Loose or no longer providing adequate support Missing during a heating system restoration

Inspect the surrounding heat exchanger mounting points and associated hardware before installation.

Porsche 356 Heat Exchanger Supports & Heating System Parts

The Porsche 356 heating system relies on correctly mounted heat exchangers and associated components to provide warm air to the passenger compartment.

Ageing supports can become corroded, weakened or damaged, affecting the stability and alignment of the heating assembly.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

61621124000
61621124000

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About Exhaust Nuts / Bolts / Studs

Exhaust Nuts, Bolts & Studs for Porsche | Secure Fitment for High-Performance Exhaust Systems

Your Porsche’s exhaust system operates under extreme heat, vibration, and pressure — making durable fasteners like exhaust nuts, bolts, and studs essential for reliability and safety. These components secure exhaust manifolds, catalytic converters, mufflers, and pipes together, maintaining a tight seal and precise alignment throughout the system.

At Design911, we offer a wide selection of standard and precision-engineered exhaust fasteners designed to meet or exceed manufacturer specifications. Made from heat-resistant, corrosion-proof materials, these nuts, bolts, and studs ensure long-lasting performance, perfect fitment, and effortless installation for both standard and performance exhaust systems.

Whether you’re rebuilding a classic 911 or servicing a modern Porsche GT model, our high-strength exhaust fixing hardware provides superior durability and resistance to loosening under thermal cycling.

What Do Exhaust Nuts, Bolts & Studs Do?

These components are the backbone of the exhaust system’s structural integrity. They keep all exhaust sections securely connected, ensuring no movement or leaks under load.

Core Functions:

  • Secure exhaust joints and flanges between manifolds, catalytic converters, and pipes.
  • Maintain consistent exhaust pressure by preventing gaps or misalignment.
  • Reduce vibration and mechanical stress.
  • Enable easy serviceability for exhaust maintenance or upgrades.
  • Ensure safe operation under high heat and pressure.

Without robust fasteners, even the most advanced exhaust systems can suffer from leaks, rattling, or part failure — leading to reduced performance and increased emissions.

Why Do Exhaust Fasteners Fail?

Exhaust nuts, bolts, and studs operate in one of the harshest environments in a vehicle. Over time, exposure to heat, moisture, and vibration can degrade even the strongest materials.

Common Causes of Failure Include:

  • Corrosion or rust from moisture and road salt.
  • Thermal expansion causing loosening or cracking.
  • Over-torquing during installation.
  • Metal fatigue from repeated heating and cooling cycles.
  • Cross-threading or thread stripping during servicing.

When fasteners fail, exhaust leaks, rattling, and poor gas flow can occur — impacting performance, sound, and emissions compliance.

Why Replace or Upgrade Your Exhaust Fasteners?

Replacing worn or rusted exhaust hardware is vital for ensuring the longevity and reliability of your Porsche’s exhaust system.

Key Benefits:

  • Restores exhaust system integrity and secure fitment.
  • Prevents leaks, rattles, and misalignment. Improves exhaust flow and performance reliability.
  • Crafted from high-strength stainless steel or coated alloy.
  • Direct-fit compatibility for Porsche 911, Cayman, Boxster, Panamera & Macan.
  • Ideal for both restoration and performance applications.

High-quality fasteners not only provide peace of mind during installation but also withstand years of performance driving without corrosion or seizing.

Highlights:

  • Premium exhaust nuts, bolts & studs for Porsche vehicles.
  • Designed for high-heat, high-vibration environments.
  • Prevents leaks and loosening in the exhaust system.
  • Heat- and corrosion-resistant stainless steel construction.
  • Ideal for rebuilds, upgrades, or performance tuning.
  • Precision-engineered to manufacturer standards.

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