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- 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)
This OE match adjustable spring plate is a direct replacement for the original Porsche component used on 911 models equipped with the 915 gearbox. Engineered to original specifications, it integrates seamlessly into the torsion bar rear suspension system. Unlike fixed spring plates, this adjustable version allows precise ride height tuning via an integrated adjustment mechanism, eliminating the need for repeated torsion bar re-indexing.
Sold individually, 2 required per vehicle.
Fits:
Porsche 911 1976 - 1986 915 Gear Box
Replacement for Diagram Ref No.16
Unfortunately, lowering the rear of your 911/912/930 is not nearly as easy as lowering the front. That is until you install this new Adjustable Spring Plate kit Now your rear ride height can be adjusted to your desired level with a simple turn of a bolt.
Note: When using adjustable spring plates with stock torsion bars, the splines may be a tight fit and require a small amount of hand fitting.
Spring plate normally rust, replacing them will give you a better ride.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91133300905
The product you are viewing cross references to these numbers
- 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)
- Porsche 911 1978-1989 3.3L Turbo (930)
Sold in sets of (4), enough for both sides of one car.
Fits:
Porsche 911/912/930 ALL 1965-89
Gain back ride quality and rear end stability with High Density Rear Spring Plate Bushings for your 911. Under prolonged use, especially when driven hard, the OEM bushings can break down allowing more slop in the rear suspension. If neglected long enough or driven under heavy load enough, these bushings will eventually deform allowing the spring plate to contact the cover plate. Replacing your factory bushings with our 25% stiffer units will allow full and smooth articulation of the spring plate, thus improving the ride quality and performance of the legendary rear end in your classic 911. Featuring a higher, "sport" durometer these rubber mounts are a great compromise between soft factory mounts and solid/spherical bearings often used to replace them.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133300309
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
The OE Match Rear Spring Plate with Bushing is a replacement suspension component for early Porsche 911 and Porsche 912 models using the rear torsion-bar suspension system.
Price Is Each.
- Porsche 911S / 911TU / 911L 1965-68
- Porsche 912 1965-68
Diagram Ref No 16
The spring plate connects the rear suspension to the torsion bar and transfers suspension movement and load into the torsion bar as the rear wheels move over bumps, during cornering and under acceleration or braking.
The integrated rubber bushing supports the spring plate within its mounting point while allowing controlled suspension movement. It also helps isolate vibration and prevents excessive metal-to-metal movement between the spring plate and surrounding suspension structure.
Correct spring plate condition is essential for maintaining rear ride height, suspension geometry and predictable handling. On older vehicles, corrosion of the metal plate and deterioration of the rubber bushing can lead to increased movement, noise and inconsistent suspension behaviour.
What This Product Does:
- Connects the rear suspension assembly to the torsion bar.
- Transfers suspension loads into the torsion bar.
- Allows the torsion bar to provide the rear springing force.
- Helps maintain the correct rear ride height.
- Supports consistent rear suspension geometry.
- Helps control wheel movement under acceleration, braking and cornering.
- Uses a rubber bushing to allow controlled articulation.
- Helps isolate vibration and suspension noise from the chassis.
- Prevents excessive movement between the spring plate and its mounting points.
- Replaces a corroded, damaged or distorted original spring plate.
- Replaces an aged, cracked or deformed spring plate bushing.
The spring plate is a central part of the classic Porsche torsion-bar suspension system. As the rear suspension moves, the torsion bar twists and stores energy, while the spring plate transmits that movement between the suspension and torsion bar.
Symptoms Of Wear Or Failure:
Possible symptoms include:
- Knocking or clunking from the rear suspension.
- Creaking or rubbing noises over bumps.
- Excessive movement around the spring plate mounting area.
- Rear suspension feeling loose or less precise.
- Vehicle wandering or feeling unstable during cornering.
- Uneven or sagging rear ride height.
- One side of the vehicle sitting lower than the other.
- Increased vibration through the rear of the vehicle.
- Poor rear suspension response.
- Visible cracking or deterioration of the rubber bushing.
- Rubber becoming compressed or permanently distorted.
- Spring plate contacting its cover or surrounding metalwork.
- Heavy corrosion or rust on the spring plate.
- Pitting, scaling or loss of material from the plate.
- Bent or physically damaged spring plate.
- Difficulty maintaining correct rear suspension alignment.
Some of these symptoms can also be caused by worn torsion bars, trailing-arm bushes, wheel bearings or other suspension components, so the complete rear suspension should be inspected before replacement.
Why Replacement Matters:
The spring plate forms a structural connection between the rear suspension and torsion bar.
If the plate becomes badly corroded, damaged or distorted, it may no longer transmit suspension loads correctly. Similarly, a deteriorated bushing can allow excessive movement at the mounting point.
Replacing a worn spring plate and bushing helps restore:
- Correct rear suspension movement.
- Consistent ride height.
- Improved rear-end stability.
- More predictable handling.
- Correct suspension geometry.
- Reduced knocking and rubbing noises.
- Better isolation of vibration.
- Reliable torsion-bar operation.
A sound spring plate assembly also helps prevent unnecessary loads from being transferred into surrounding suspension components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133300307
The product you are viewing cross references to these numbers
- 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
The OE Match Rear Spring Plate with Bushing is a replacement suspension component for classic Porsche 911 and Porsche 912 models equipped with rear torsion-bar suspension.
Price Is Each.
- Porsche 911 1969-76
- Porsche 912 1969
Diagram Ref No 25
The spring plate forms an important connection between the rear suspension and the torsion bar. As the rear wheel moves through its suspension travel, the spring plate transfers that movement into the torsion bar, which twists to provide the springing force required to support the rear of the vehicle.
The integrated rubber bushing supports the spring plate within its mounting point while allowing controlled rotational movement. It also helps isolate vibration and prevents excessive metal-to-metal movement between the spring plate and surrounding suspension structure.
Over time, original spring plates can suffer from corrosion, while the rubber bushings can harden, crack, compress or deform. Replacing the complete assembly helps restore correct suspension movement, rear ride height and predictable handling.
What This Product Does:
- Connects the rear suspension to the torsion bar.
- Transfers suspension movement and load into the torsion bar.
- Allows the torsion bar to provide the rear springing force.
- Helps maintain correct rear ride height.
- Supports stable rear suspension geometry.
- Helps control wheel movement during acceleration, braking and cornering.
- Uses a rubber bushing to provide controlled articulation.
- Helps isolate suspension vibration and noise from the chassis.
- Prevents excessive movement at the spring plate mounting point.
- Replaces a corroded, bent or damaged original spring plate.
- Replaces an aged, cracked or deformed spring plate bushing.
- Helps restore suspension performance during a rear suspension rebuild or vehicle restoration.
A correctly functioning spring plate and bushing assembly helps maintain consistent rear ride height, alignment and smooth suspension articulation.
Symptoms Of Wear Or Failure:
Possible symptoms include:
- Knocking or clunking from the rear suspension.
- Creaking or rubbing noises over bumps.
- Rear suspension feeling loose or less precise.
- Excessive movement around the spring plate mounting point.
- Vehicle feeling unstable or vague during cornering.
- Uneven rear ride height.
- One side of the vehicle sitting lower than the other.
- Increased vibration through the rear of the vehicle.
- Poor or inconsistent suspension response.
- Spring plate rubbing against its cover.
- Visible cracking or deterioration of the rubber bushing.
- Rubber becoming compressed or permanently distorted.
- Heavy corrosion or rust on the spring plate.
- Deep pitting or scaling of the metal.
- Bent or physically damaged spring plate.
- Difficulty maintaining correct rear wheel alignment.
Worn bushings can deform enough to allow the spring plate to contact its cover, producing rubbing or knocking noises and allowing unwanted suspension movement.
Why Replacement Matters:
The spring plate is a structural part of the rear torsion-bar suspension system.
If the plate becomes badly corroded, distorted or damaged, it may no longer transfer suspension loads correctly. Likewise, deteriorated bushings can allow excessive movement and prevent the spring plate from remaining accurately positioned.
Replacing a worn assembly helps restore:
- Correct rear suspension movement.
- Consistent ride height.
- Improved rear-end stability.
- Predictable handling.
- Correct suspension geometry.
- Reduced knocking and rubbing noises.
- Better vibration isolation.
- Reliable torsion-bar operation.
- More consistent tyre contact with the road.
Maintaining tight, controlled spring plate movement also helps reduce unnecessary stress on surrounding suspension components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133300309
The product you are viewing cross references to these numbers
- 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)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 912E 4CYL 1976
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