Spring Plate Bushings Set, Heavy Duty. Porsche 911 / 912

Spring Plate Bushings Set, Heavy Duty.

Enhance your Porsche’s handling and ride precision with this Heavy-Duty Spring Plate Bushing Set.
Designed for rear torsion bar suspension systems on air-cooled Porsche 911 and 912 models, these upgraded bushings replace the factory rubber mounts that support the spring plate.
Sold As A Set Of 4.

Fits:

• Porsche 911 1965-1969 2.0L / 912 SWB (F)
• Porsche 911 1970-1973 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 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)

Fits On To Diagram Ref No 25

What This Product Does:

• The spring plate is part of the torsion bar suspension system: as the rear suspension moves, the torsion bar twists, and the spring plate (with its bushings) transmits those torsional loads to the chassis.
  
• The bushings isolate vibration and reduce noise, and they allow some controlled movement, while preventing excessive play.
  
• A correctly functioning spring plate + bushing assembly helps maintain rear ride height, alignment consistency, and smooth articulation of the rear suspension under dynamic load.
  
  

Symptoms Of Worn Or Failing Bushings:

• Clunking / knocking noise at the rear when driving over bumps or under load.
  
• Sagging or uneven ride height at the rear (one side lower)
  
• Excessive rear vibration or harshness under acceleration or load
  
• Contact / rubbing noise — the worn bushings may allow the spring plate to contact its cover or adjacent metal surfaces.
• Degraded handling / instability in the rear under cornering
• Loss of the “tight” feel in the rear suspension; more play in the rear suspension response

Why Replacement Matters:

• Restores Rear End Stability & Ride Quality: The upgraded, stiffer bushings reduce unwanted movement and maintain better control under load.
  
• Preserves Correct Geometry & Height: Keeps torsion bar and spring plate alignment tight, preventing sag or misalignment over time.
  
• Reduces Noise & Harshness: Eliminates metal-to-metal contact and vibration that results from deteriorated rubber.
  
• Better Durability: Heavy-duty rubber compound resists deformation, aging, heat, and oil.
  
• Protects Other Components: Reduces stress on torsion bars, suspension arms, and adjoining parts that might be damaged by excessive play.
  
• Essential for Restoration / Rebuilds: When rebuilding rear suspension or restoring a classic 911, these bushings are part of a full refresh to return the car to factory (or better) behavior.

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

90133300309

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