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Porsche928 (1978-1995)928S 4.7L 1981-83Suspension & AxleSpring Plate
Spring Plate Bushings Set, Heavy Duty. Porsche 911 / 912 › 90133300309
Spring Plate Bushings Set, Heavy Duty. Porsche 911 / 912 - 90133300309
90133300309/5
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- 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 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
Information
Spring Plate Bushings Set, Heavy Duty.
Fits On To Diagram Ref No 25
What This Product Does:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133300309
The product you are viewing cross references to these numbers
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.
- 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
91133300905
91133300902
911333009XX
90133300309
90133300307
91133300906
90133300301
The product you are viewing cross references to these numbers
Price: £80.35
In stock
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