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Porsche > 356 (1950-1965) > Suspension & Axle >

Spring Plate

Spring Plate

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DISPLAYING 17 to 19 (of 19 products)
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Torsion Bar Rubber Sleeve With Rim. Porsche 356 A / B - 64433313100 - 31203
4
Torsion Bar Rubber Sleeve With Rim. Porsche 356 A / B
Black Friday Sale
64433313100/3
Product Information
Product Information
Torsion Bar Rubber Sleeve With Rim.
Ensure your classic Porsche’s torsion-bar suspension remains quiet, stable and correctly aligned with this rubber sleeve. Designed for Porsche models such as the 356 A/B, this sleeve features a seating rim for precise positioning and helps isolate torsional loads while maintaining correct mount geometry. A critical yet often overlooked component in torsion-bar systems, this replacement sleeve restores proper bar support, reduces noise and ensures ride height and suspension behavior.
Sold Each.
x2 Required Per Car.

Fits:
  • Porsche 356A 1955-59
  • Porsche 356B 1959-63

Diagram Ref No 36

What This Product Does:

  • The sleeve cushions the torsion bar where it passes through or mounts to the chassis or spring plate. Because torsion-bars twist under load, this sleeve helps reduce metal-to-metal contact, absorb vibrations or harshness, and maintain correct bar location and alignment.
  • The “with rim” detail likely means it has a flange or rim that seats against a plate or bracket, ensuring correct fit and preventing movement of the sleeve out of position.
  • By keeping the torsion bar isolated and aligned, the sleeve helps maintain correct ride height, suspension behavior, and prevents unwanted noise, wear, or alignment shifts due to a loose or worn bar mount.


Symptoms & Signs Of Wear Or Failure:

  • Clunks or knocks from the rear (or whichever end the torsion bar is mounted) when going over bumps, indicating the torsion bar is moving within its mount.
  • Loss of ride height or inconsistent ride height, because the torsion bar may not be seating properly.
  • Increased vibration or harshness being transmitted from the torsion bar area into the chassis or cabin.
  • Suspension geometry changes / alignment drift, because the torsion bar may shift or twist out of its correct location.
  • Visible rubber degradation — cracking, splitting, flattening, or the rim/seating portion being damaged. On inspection you may see the sleeve has collapsed or the rim no longer seats properly.

Why Replacement Matters:
  • Over time, rubber components like this sleeve degrade from age, heat, load, UV exposure and the twisting action of the torsion bar. A worn sleeve compromises the mount of the torsion bar and therefore the overall behavior of the suspension.
  • Especially in older vehicles or restorations, replacing such small components is critical to preserving the integrity of the suspension system rather than just chasing obvious wear points.
  • For classic Porsche owners maintaining these older torsion-bar systems, ensuring these sleeves are in good condition means you’ll keep ride height correct, less unwanted movement, better durability, and fewer secondary failures (e.g., as the bar shifts it may overload other bearings or mounts).



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

64433313100
64433313100

The product you are viewing cross references to these numbers
Torsion bar rubber sleeve without rim. Porsche 356 / 911 1965-67 - 64433313100 - 64433313100 - PS8876, URO-003656, 9220110, 1652250100
2
Torsion bar rubber sleeve without rim. Porsche 356 / 911 1965-67 - 64433313100
Black Friday Sale
64433313100/1
Product Information
Product Information
Torsion bar rubber sleeve INNER without rim . Rear axle.

Outer dia: 69mm
Inner dia: 48mm
Thickness: 31mm

Fits:
Porsche 356 pre-A / A  1950-1959
Porsche 356 B / C 1960-1965 (chassis >>131 720, >>154 229, >>88 663)

Porsche 911/912 1965-1967 (up to chassis #307325)

For 356 Pre-A, A, and B, 4 are required w/original covers, and 2 are required w/replacement covers. For all 356C models, 2 are required).

Diagram ref no 36

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

64433313100
64433313100

The product you are viewing cross references to these numbers
Torsion bar rubber sleeve. Porsche 356 / 911 1965-67 - 64433313100
2
Torsion bar rubber sleeve. Porsche 356 / 911 1965-67
Special Order item
64433313100
Product Information
Product Information
Torsion bar rubber sleeve.
Rear Axle.

Outer dia: 69mm
Inner dia: 48mm
Thickness: 31mm

Fits:
Porsche 356A 1950-1959
Porsche 356B 1960-1965 (chassis >>131 720, >>154 229, >>88 663)
Porsche 911/912 1965-1967

Diagram ref no 36

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

64433313100
64433313100

The product you are viewing cross references to these numbers
DISPLAYING 17 to 19 (of 19 products)
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About Spring Plate

Porsche Spring Plates | Design911 Suspension Components for Ride Height, Alignment & Stability

Spring plates are a critical part of your Porsche’s rear suspension system, connecting the torsion bars to the trailing arms and helping manage suspension travel and ride height. They act as pivot points that absorb energy during acceleration, braking, and cornering — ensuring smooth movement and maintaining chassis balance. Properly functioning spring plates preserve suspension geometry, enhance grip, and provide the responsive handling Porsche is known for.

At Design911, we supply a complete range of spring plates and components, engineered for precision, strength, and long-lasting performance. Manufactured from high-quality steel or performance-grade alloys, our spring plates deliver exact fitment and reliable operation under all driving conditions. Ideal for servicing, classic restorations, or performance tuning, they help maintain stability, comfort, and control across your Porsche’s suspension system.

What Do Spring Plates Do?

Spring plates play a vital role in controlling the movement and alignment of the rear suspension, ensuring even weight distribution and consistent handling.

Core Functions:
• Connect torsion bars to trailing arms for proper suspension movement.
• Regulate ride height and suspension travel.
• Maintain consistent rear wheel alignment under load.
• Absorb road impact to enhance ride comfort and grip.
• Provide smooth suspension articulation for balanced handling.

In perfect condition, spring plates ensure your Porsche remains stable, comfortable, and responsive — on both the road and track.

Why Do Spring Plates Fail or Degrade?

Due to constant movement, load stress, and environmental exposure, spring plates are subject to wear and corrosion over time.

Common Causes of Failure Include:
• Corrosion or rust weakening the plate material.
• Worn bushes or mounts causing excess play and vibration.
• Fatigue cracks from continuous torsional stress.
• Impact damage from potholes or aggressive driving.
• Incorrect alignment or ride height adjustments.

When spring plates fail, you may notice uneven ride height, poor alignment, or rear-end instability — clear signs that replacement is needed to restore balance and safety.

Why Replace or Upgrade Your Porsche Spring Plates?

Replacing worn or damaged spring plates restores suspension geometry, alignment accuracy, and overall handling performance. Upgraded plates offer improved adjustability and durability — ideal for performance builds or track preparation.

Key Benefits:
• Restores correct suspension geometry and rear alignment.
• Improves ride height consistency and handling stability.
• Reduces vibration, noise, and rear-end movement.
• Available in adjustable or fixed designs for various Porsche models.
• Fits Porsche 911, 912, 914, 944, and classic air-cooled models.
• Perfect for restoration, servicing, or motorsport applications.

Design911’s Porsche spring plates combine precision engineering and long-lasting performance — ensuring your Porsche handles with the strength and stability it was designed for.

Highlights

• Premium Porsche spring plates and related suspension components.
• High-strength steel or performance alloy construction.
• Restores alignment, ride height, and suspension balance.
• Available in adjustable and performance variants.
• Suitable for both classic and modern Porsche models.
• Perfect for servicing, performance tuning, or full restoration projects.

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