Spring Plate, Black / Opened Type. Porsche 356 C

Spring Plate, Black / Opened Type.
Restore the rear torsion‐bar mounting on your Porsche 356 C with this high‐quality spring plate, finished in black and of the “opened” type design. It ensures the torsion bar end is securely mounted, aligned and protected against corrosion, maintaining correct ride height, geometry and rear suspension integrity. Ideal for restoration projects or performance refreshes on 356 C models.
Sold Each.
x2 Required Per Car.

Fits:

• Porsche 356C 1963-65

Diagram Ref No 24

What This Product Does:

• In the torsion-bar suspension setup of the Porsche 356 C, the spring plate is the mounting interface for the torsion bar (usually at the rear axle). It holds the torsion bar end and its bushings, and anchors it to the chassis or subframe.
• The “opened type” plate may allow easier access for maintenance or re-indexing of the torsion bars (for ride‐height adjustment) or visual inspection.
• A properly manufactured spring plate ensures that the torsion bar is secured, aligned and able to transmit spring loads correctly, maintaining ride height, axle alignment and consistent geometry under load.
• Because the plate is finished black (coated) and designed for direct fit, it also contributes to long life and corrosion resistance — important on older cars which may suffer from rust or fatigue in suspension parts.

Symptoms & Signs Of Wear / When Replacement Is Advisable:

• Visible corrosion or fatigue: On a 356 C many years old, the spring plates may be rusted, the mounting bolts corroded, or the plate weakened.
  
• Ride height irregularities or sagging: If the torsion bar end mount is compromised, the effective spring length or preload may change, causing uneven ride height.
  
• Poor rear axle location or alignment shifts under load: A failing plate may allow movement, which can lead to axle or alignment issues, excessive tire wear, or vague handling.
  
• Noisy rear suspension or clunks: If the bushings or torsion bar end shift within the plate, you may hear knocking over bumps.
  
• Difficulty adjusting torsion bars/riding height: If the plate is damaged or seized, re‐indexing or maintenance becomes harder.
  
  

Why Replacement / Upgrade Matters:

• Maintaining chassis integrity: On a classic 356, the rear torsion bar and spring plate form part of the suspension’s backbone. A compromised plate undermines everything else.
  
• Restores original ride and handling behaviour: With a correct spring plate, the torsion bar mount is secure and geometry remains stable.
  
• Supports further modifications or restoration: If you’re restoring the car, refreshing the spring plates ensures the setup is built on a solid foundation.
  
• Improves longevity and resale value: Using correct or upgraded parts (like correct close tolerances, correct finish) is viewed positively in restoration circles.
  
• Corrosion protection: The “black / opened type” finish may provide better protection compared to untreated plates—important for longevity.

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

69533301300

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