Spring Plate Adjustable, Rear. Porsche 911 1969-86  ❭  90133300309

Spring Plate Adjustable, Rear.
Enhance your Porsche’s suspension precision with this Adjustable Rear Spring Plate, designed for classic torsion-bar models. A direct replacement part, this adjustable version allows fine-tuning of ride height, preload, and camber — ideal for performance upgrades, corner balancing, or precise geometry correction.
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x2 Required Per Car.

Fits:

• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1975-1977 3.0L Turbo (930)

Diagram Ref No 16

What This Product Does:

• The spring plate is the point where the torsion bar is mounted into the chassis — it transfers torsional force (spring action) from the torsion bar to the body / suspension.
  
• The adjustability allows you to change how much preload (twist) is put on the torsion bar, which influences ride height, spring rate, and camber under load. This is especially beneficial for performance tuning or if you have modified suspension, tires, or body geometry.
  
• With an adjustable plate, you can fine-tune corner balance, handling traits, and compensate for wear or changes in suspension parts over time.
• Also, replacing old, rusty, or fatigued plates with fresh adjustable ones restores rigidity, consistency, and accuracy to the rear suspension geometry

Symptoms & Signs You May Need Replacement:

• The original plates are rusty, corroded, or weakened (common in older cars)
• The car’s rear ride height or camber is out of spec, and you need a way to adjust without drastic modifications.
• You notice uneven tire wear, or inconsistent handling from side to side, which can be improved by more precise geometry control.
  
  

Why This Upgrade Matters:

• Upgrading to adjustable rear spring plates gives you complete control over your Porsche’s suspension setup. Factory plates offer no fine adjustment, making it difficult to achieve precise ride height, camber, and corner balance — especially on modified or track-driven cars.
  
• With this adjustable design, you can easily tune torsion bar preload and suspension geometry, ensuring the perfect stance and balance for your driving style. The result is sharper turn-in, improved rear-end grip, and more predictable handling, whether on the road or at the circuit.
  
• For classic Porsche models using torsion-bar suspension, this upgrade transforms the driving experience — combining modern adjustability with quality fitment and long-term reliability.

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

90133300309

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