Spring Plate

Bushings Set With Instructions.

The OE Match Heavy Duty Rear Spring Plate Bushing Set is a firmer replacement rubber bushing kit for the rear torsion-bar suspension fitted to selected classic Porsche 911, 912 and 930 models.

Includes 4x Heavy Duty rubber softness spring plate bushings  (w/ 80-85 shore A)
Outer dia: 75mm
Inner dia: 48mm
Thicknes: 42mm

Fits:

• Porsche 911 1968-89
• Porsche 912 1968-69
• Porsche 912 1976
• Porsche 930 1978-79

The kit contains four heavy-duty rubber spring plate bushings, providing the inner and outer bushes required for both rear spring plates, together with fitting instructions.

Rated at approximately 80–85 Shore A, these bushes are considerably firmer than the standard OE Match version, which uses approximately 55–60 Shore A rubber. The higher-durometer construction provides more positive spring plate location and reduced unwanted suspension movement, making the kit particularly suitable for fast-road, performance and more demanding suspension applications.

The rear spring plates connect the torsion bars to the rear suspension and rotate as the wheels move through their suspension travel. Rubber bushes support the spring plates where they pass through the torsion-bar housing and spring plate covers.

As the original rubber ages, it can compress, crack, harden and deform, allowing the spring plates to move away from their intended position. Replacing deteriorated bushes helps restore accurate spring plate support, consistent rear suspension geometry and more predictable handling.

What This Product Does:
The spring plate bushings support and locate the rear spring plates within the torsion-bar housing and spring plate covers.

They are designed to:

• Support the rear spring plates.
• Keep the spring plates correctly centred.
• Allow controlled rotational suspension movement.
• Reduce unwanted lateral and vertical movement.
• Help maintain rear suspension geometry.
• Reduce metal-to-metal contact.
• Improve suspension response.
• Support more consistent handling.
• Replace compressed, cracked or hardened original rubber bushes.
• Provide firmer suspension location than standard-specification rubber.

Symptoms Of Wear Or Failure:
Possible symptoms include:

• Rear suspension squeaking.
• Creaking over bumps.
• Clunking from the rear suspension.
• Spring plates sitting off-centre.
• Uneven clearance around the spring plate cover.
• Metal-to-metal rubbing.
• Excessive rear suspension movement.
• Rear end feeling loose or imprecise.
• Reduced stability during cornering.
• Changes in rear wheel alignment.
• Uneven tyre wear.
• Suspension movement during acceleration or braking.
• Visible cracks in the rubber.
• Rubber becoming hard or brittle.
• Rubber separating from the spring plate.
• Spring plate cover showing rubbing marks.

Why Replacement Matters:
Replacing deteriorated spring plate bushings helps restore:

• Correct spring plate support.
• Consistent suspension movement.
• Proper rear suspension geometry.
• Reduced unwanted compliance.
• Improved handling precision.
• Reduced suspension noise.
• Proper clearance around the spring plate.
• More predictable rear suspension behaviour.

Choosing the heavy-duty version additionally provides firmer spring plate location for drivers prioritising suspension control and response.

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

91133300900BHD

The product you are viewing cross references to these numbers

Bushings Set With Instructions.

The OE Match Rear Spring Plate Bushing Set is a standard-specification rubber suspension bushing kit designed to restore the mounting and movement of the rear spring plates on selected classic Porsche 911, 912 and 930 models.

Includes 4x Standard rubber softness spring plate bushings  (w/ 55-60 shore A)
Outer dia: 75mm
Inner dia: 48mm
Thicknes: 42mm

Fits:

• Porsche 911 1968-89
• Porsche 912 1968-69
• Porsche 912 1976
• Porsche 930 1978-79

The rear spring plates form an important part of the Porsche torsion-bar rear suspension. They connect the rear torsion bars to the trailing-arm assembly and move as the suspension rises and falls.

Rubber bushings support each spring plate where it passes through the torsion-bar housing and spring plate cover. These bushings allow controlled rotational movement while helping keep the spring plate correctly positioned within the suspension assembly.

Over time, the original rubber can compress, harden, crack and deform. This allows the spring plate to sit off-centre, increasing unwanted suspension movement and potentially allowing metal-to-metal contact between the spring plate and its cover.

Replacing worn bushings helps restore correct spring plate support, suspension geometry, ride quality and predictable rear suspension behaviour.

What This Product Does:
The rear spring plate bushings support the spring plates within the rear torsion-bar suspension.

They are designed to:

• Support the rear spring plates.
• Keep each spring plate correctly centred.
• Allow controlled rotational suspension movement.
• Isolate vibration between suspension and body.
• Reduce metal-to-metal contact.
• Help maintain rear suspension geometry.
• Support predictable rear wheel movement.
• Reduce unwanted spring plate movement.
• Restore factory-style rubber compliance.
• Replace compressed, cracked or deteriorated original bushings.

Symptoms Of Wear Or Failure:
Possible symptoms include:

• Rear suspension squeaking.
• Creaking from the rear suspension.
• Clunking over bumps.
• Increased rear suspension movement.
• Spring plate sitting off-centre in the cover.
• Uneven gap around the spring plate cover opening.
• Spring plate contacting the cover.
• Metal-to-metal rubbing marks.
• Rear suspension feeling loose.
• Reduced stability during cornering.
• Changes in rear wheel alignment.
• Uneven rear tyre wear.
• Vehicle wandering or feeling less settled.
• Visible cracked or deteriorated rubber.
• Rubber separating from the spring plate.
• Suspension noise during acceleration or braking.
• Excessive rear suspension compliance.

Why Replacement Matters:
Replacing worn spring plate bushings helps restore:

• Correct spring plate positioning.
• Controlled suspension movement.
• Factory-style rubber compliance.
• Reduced suspension noise.
• Reduced unwanted movement.
• Improved rear suspension consistency.
• Proper clearance around the spring plate.
• More predictable handling.
• Better foundation for accurate wheel alignment.

On a classic Porsche, replacing decades-old suspension rubber can make a significant difference to how precise and settled the rear suspension feels.

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

91133300900B

The product you are viewing cross references to these numbers

Rear spring plate rubber bush.

Fits:
Porsche 911 1965-67

Diagram Ref No. 26

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

90133319500

The product you are viewing cross references to these numbers

Rear spring plate rubber bush. OUTER

Fits:
Porsche 911 1965-67

Diagram ref no. 26

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

90133319500

The product you are viewing cross references to these numbers

Rear trailing arm to spring plate eccentric bolt.

Fits:
Porsche 911/912 1965-73

Diagram ref no 27

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

90133313310

The product you are viewing cross references to these numbers

Rear trailing arm to spring plate eccentric bolt.
Price is each.

Fits:
Porsche 911/912 1965-73

Diagram ref no 27

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

90133313310

The product you are viewing cross references to these numbers

Rear trailing arm to spring plate eccentric bolt.
Price is each.

Fits:
Porsche 911/912 1965-89
Porsche 911 (930) 1975-89

Diagram ref no 28

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

90133313305

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OE Match rear suspension eccentric bolt for the trailing-arm connection at the spring plate on Porsche 911, 912 and 930 Turbo applications. Intended for replacement during suspension repairs or restoration.
Price is each

Fits:
Porsche 911/912 1965 - 1989
Porsche 911 (930) 1975 - 1989

Diagram ref no 28

What This Product Does

This eccentric fastener forms part of the rear suspension connection between the trailing arm and spring plate. It is a hardware component, rather than a complete spring plate or trailing-arm assembly.

Technical Details

• Part reference: 90133313305.
• Brand: OE Match.
• Installation position: rear trailing-arm/spring-plate connection.
• The supplied rear-axle diagrams identify this component as an eccentric and specify two per assembly; this is not a two-piece set.

Symptoms of Fault

Rear suspension noises, irregular tyre wear or inconsistent alignment warrant inspection of the complete assembly. Bushes, mounts and other suspension components can produce similar symptoms, so these signs do not establish that the eccentric bolt is faulty.

Why Replacement Matters

Renewal may be appropriate when inspection identifies damaged or corroded suspension hardware. Check the adjoining components during the repair rather than replacing the bolt solely on the basis of noise or handling symptoms.

FAQs

Is this a complete spring plate?
No. The product is the eccentric bolt used at the trailing-arm connection.

Should alignment be checked afterwards?
A rear geometry check is appropriate following work that disturbs the spring-plate or trailing-arm settings.

How do I confirm the correct component?
Compare reference 90133313305 with the original hardware and check the vehicle application. Diagram positions differ between assemblies.

Related reference numbers
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90133313305

The product you are viewing cross references to these numbers

Rear trailing arm to Spring plate Hexagon Nut. M12x1,5

Fits:
Porsche 356 B / 356 C
Porsche 911 1965 - 1983
Porsche 911 Turbo 1975 - 1977

Diagram ref no 28.

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90003403601

The product you are viewing cross references to these numbers

Spacer ring for rear axle.

Fits:
Porsche 911 2.0-3.0 01/63-07/77
Porsche 912 1.6 01/65-02/70

Diagram Ref No 32

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90133110700

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Spacer ring for rear axle
OE Match spacer ring for the rear axle on Porsche 911 models from 1965 to 1977. This replacement rear axle spacer helps support correct component spacing, alignment, and assembly within the rear hub / axle area.
Sold individually

Fits:
Porsche 911 2.0-3.0  01/1963 - 07/1977
Porsche 912 1.6   01/1965 - 02/1970

Diagram ref no 32

The spacer ring provides the required spacing between rear axle components, helping ensure the hub, bearing, or related axle parts are correctly positioned when assembled. Correct spacing is important for reliable rear axle operation, bearing support, and drivetrain alignment.

Functions
•  Replaces the rear axle spacer ring
•  Provides correct spacing within the rear axle assembly
•  Helps support rear hub and bearing alignment
•  Assists with correct rear axle component positioning
•  Suitable for rear hub, bearing, or axle service
•  Replaces worn, damaged, corroded, missing, or previously removed spacer rings
•  OE Match replacement for Porsche 911 rear axle repair.

Why Replace This Part?
Rear axle spacer rings can wear, corrode, distort, become damaged, or be lost during rear hub or bearing service. An incorrect, worn, or missing spacer may affect component alignment, bearing support, rear axle assembly, or drivetrain reliability. Replacing the spacer ring helps ensure the rear axle is assembled correctly.

When to Replace This Part
•   Rear axle or hub assembly is being serviced
•   Rear wheel bearing work is being carried out
•   The original spacer ring is worn, corroded, distorted, damaged, or missing
•   Rear axle components have been removed for repair
•   Correct component spacing must be restored
•   The vehicle is undergoing Porsche 911 drivetrain or suspension restoration
•   Preventative replacement is required during rear axle overhaul.

Where it fits on the car
This spacer ring fits within the rear axle / rear hub assembly on Porsche 911 models from 1965 to 1977. Exact position depends on model year and rear axle layout.

Related reference numbers
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90133110700

The product you are viewing cross references to these numbers

Spring plate covers normally rust, replacing them will give you a better ride.

Fits:
Porsche 911 1965-89
Porsche 930 1975-77

Diagram Ref No. 29

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90133315300

The product you are viewing cross references to these numbers

Spring plate covers normally rust, replacing them will give you a better ride.

Fits:
Porsche 911 1965-89
Porsche 930 1975-77

Diagram Ref No. 29

Related reference numbers
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90133315300

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SuperPro Replacement Spring Plate Bush Competition use recommended
Replacement for Porsche parts No. 91133300900
SET OF 4

Fits:
Porsche 911 1974-89

Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components.

Click 'Zoom in' for large parts diagram.
Fits to No. 16 on the diagram.

Related reference numbers
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SPF0242K

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Powerflex PFR57-411 Replacement Spring Plate Bush.
SET OF 4

Fits:
Porsche 911 1965-67

Fits to No. 16 on the diagram.

Powerflex. Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components.

Related reference numbers
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PFR57-411

The product you are viewing cross references to these numbers