Adjustable Spring Plate Zinc Plated - Closed Type. Porsche 356 / 356A / 356B

Adjustable Spring Plate Zinc Plated - Closed Type.

Renew the rear torsion-bar mount on your classic Porsche 356 with this premium adjustable, zinc-plated, closed-type spring plate. Designed for models from the Pre-A era through 356 A and 356 B. The plated finish ensures long-term corrosion resistance, while the closed-type design offers improved durability and cleaner appearance. With its adjustable indexing feature, you can set ride height or corner balance precisely — ideal for restoration, spirited driving or show-quality builds.
Sold Each.
x2 Required Per Car.

Fits:

• Porsche 356 1950-55
• Porsche 356A 1955-59
• Porsche 356B 1959-63

What This Product Does:

• In a torsion bar suspension, the torsion bars provide springing by twisting under load, and the spring plate is the mount that anchors and supports the torsion bar end, controls ride height, and maintains alignment of the bar mounting.
• An adjustable spring plate allows for ride-height or corner-balancing changes by indexing or re-positioning the torsion bar mount. The “closed type” design improves durability and sealing of the mounting area.
  
• The zinc plating adds rust/corrosion protection, especially important in older cars with exposed suspension components.
• By maintaining correct mount geometry, the spring plate ensures that the torsion bar works within its intended range, the rear axle remains located correctly, and the chassis retains its handling characteristics.

Symptoms & Signs Of Wear Or Needing Replacement:

• Ride height is inconsistent or cannot be set accurately — e.g., rear is lower or higher than specification, even after index adjustment.
• Rear axle movement, clunks or knocks from the rear suspension when the car is driven over bumps — indicating play in the torsion bar mount or plate.
• The torsion bar mount area shows visible corrosion, fatigue, or deformation of the plate or its mountings.
• Suspension geometry (camber, toe) drifting under load or cornering — because the torsion bar mounting is loose or shifting.
• Difficulty in re-indexing torsion bars or keeping ride height consistent. The adjustable feature may be worn or seized.

Why Replacement / Upgrade Matters:

• On early 356 cars these parts are old and often have corrosion, fatigue, or alignment issues from decades of use and environmental exposure. Replacing the spring plate restores structural integrity.
• An Adjustable + Zinc-Plated + Closed type unit offers several advantages:
• Adjustable for ride height or corner balancing if you’re restoring or modifying the car.
• Zinc plating for corrosion protection extends lifespan.
• Closed type design better seals the mount area, prevents debris ingress and offers improved durability.
• Correct ride height and suspension geometry are critical for handling and tyre lifespan — a compromised spring plate undermines these.
• For restoration projects, retaining or improving original design intent with quality parts is essential for driving feel and value.

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

64434105

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