Rear Trailing Arm

Powerflex Black Series Trailing Arm Top Silencer Block.
SET OF 4 for TWO Arms.
OEM Part Number: 90133105900



Fits:
Porsche 911 1970-89

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Diagram Ref No 3

Powerflex Black Series - Designed for the Track - Ready to Race - Engineered to be the best.

Powerflex Black Series bushes are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry. This compound can be up to 80% more resistant to load than standard rubber and 25% stiffer than our purple performance material.

If your requirements are purely for the ultimate in handling and chassis performance then Powerflex Black Series are unique, offering the most precise and accurate alignment for your chassis.

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

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

Related reference numbers
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PFR57-410BLK

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SuperPro Trailing Arm Top Silencer Block.
Replacement for Porsche parts No. 90133105900
SET OF 4



Fits:
Porsche 911 1970-89
Porsche 912
Porsche 911 SWB

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.
Diagram Ref No 3

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Related, superseded, cross reference or alternative numbers for comparison.

SPF0988K

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Trailing arm top silencer block. Sold each.



Fits:
Porsche 911/912 1965-89

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Diagram ref no 3

Related reference numbers
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90133105900

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Trailing arm top silencer block. 4 required per car. Sold each.
A rubber-bonded bushing pressed into the upper mount of the rear trailing arm. It isolates noise/vibration and fixes the trailing arm’s pivot geometry so toe/camber stay stable under load. Porsche lists it for 1965–89 911/912 (also 912E and 930). Four are used per car. 


Fits:
Porsche 911/912/930 1965-89

Why replace them and typical age-related failures: Cracked or perished rubber → rear-end clunks, squeaks, and “rear-steer” feel on throttle/brake. Ovalised inner sleeve → unstable alignment; car wanders and tramlines. Oil/heat-swollen rubber → excess compliance and braking instability. Replacing restores correct alignment, handling and braking stability  

Common issues you’ll see Play at the trailing-arm pivot (visible with a pry bar); torn rubber. Uneven rear-tyre wear (inside edges from toe change under load). Noisy rear suspension over small bumps. Alignment won’t hold after a set-up (bushings deflect back). 

Click 'Zoom in' for large parts diagram.
Diagram Ref No 3

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

90133105900

The product you are viewing cross references to these numbers