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Porsche 911 & 912 (1965-1989) 911 1965-1968 2.0L / 912 SWB (F) Suspension Upgrades Rear Sub Frame

Racing rear axle subframe silent block set, SET OF 3, Left/Right. Porsche 996 / 997  ›  99633105XXR

Racing rear axle subframe silent block set, SET OF 3, Left/Right. Porsche 996 / 997 - 99733105105, 99733105205, 99633105201, 99633105101, 99633105502, 99633105602, 99633129102 - PR52031P
3
Check vehicle fitment
99633105XXR
Product Information
Product Information

OE Match racing-specification silent block set for the rear axle subframe on Porsche 996 and 997 models. Each set contains three bushes to service one side.

Fits

  • Porsche 997
  • Porsche 996

Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

These bushes form part of the rear subframe mounting arrangement. They are replacement mounting components, rather than a complete subframe or its structural side sections.

Functions

  • Provides replacement bushes for the rear subframe mounting locations.
  • Allows renewal of the mounting bushes on either side using the same set specification.

Technical Details

  • Specification: racing version.
  • Position: rear axle subframe.
  • Contents: three bushes per set, covering one side.
  • Application: suitable for either Left or Right.

(Set of 3 bushings for one side) for Left and Right, 2 Sets required

Symptoms of Fault

Knocking at the rear, mounting play, inconsistent alignment or irregular tyre wear can warrant inspection of the subframe bushes and surrounding components. These symptoms do not establish that the bushes alone are at fault.

Why Replacement Matters

Renewal addresses worn mounting components during rear suspension repairs or a planned racing-specification build. Inspect the subframe, fixing points and associated hardware before fitting; replacement bushes do not repair corrosion or structural damage.

FAQs

Does one set cover both sides?
No. One set supplies three bushes for a single side; two sets are required to service both.

Is this the standard specification?
No. This is the racing version. Match the specification to the intended suspension setup rather than assuming standard mounting characteristics.

Should alignment be checked afterwards?
Include a geometry check when planning subframe or suspension work.



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Related, superseded, cross reference or alternative numbers for comparison.

99633105XXR
99733105105
99733105205
99633105201
99633105101
99633105502
99633105602
99633129102

The product you are viewing cross references to these numbers
Related products
HD trailing arm bushing kit. Porsche 911/912/930 65-89 - 90133105900 - PR52005P, S52005P, S-52005P
3
HD trailing arm bushing kit. Porsche 911/912/930 65-89
90133105900/2
Product Information
Product Information
HD trailing arm bushing kit.
Comes as a complete kit, (1) per car with bushings for both rear sides. replacement for OE 90133105900

Fits:
Porsche 911 / 912 / 930 1965-89

High Density trailing arm bushings for the 911 can both eliminate clunks from failing factory units and restore proper suspension geometry in your street or track car. Made from 25% higher durometer than OEM (901.331.050.00) parts, these are the ideal replacement for either failed or simply aging stock rubber units. These bushings locate rear trailing arms better under the sustained loads often experienced on track and in the rigors of everyday driving.

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

90133105900
90133105900

The product you are viewing cross references to these numbers
Heavy Duty Rear Trailing Arm Bushings Set. Porsche 911/912/930 65-89 - 90133105900 - PR52005P
3
Heavy Duty Rear Trailing Arm Bushings Set. Porsche 911/912/930 65-89
90133105900/3
Product Information
Product Information
Heavy Duty Rear Trailing Arm Bushings Set.

Upgrade your Porsche’s rear suspension with the Heavy Duty Rear Trailing Arm Bushings Set — designed to deliver sharper handling and long-lasting durability.
These bushings secure the rear trailing arms to the chassis and are critical for maintaining correct wheel alignment and suspension geometry. Over time, original rubber bushings soften or crack, leading to excess flex, vague handling, and uneven tire wear.
The HD bushings are made from a stiffer, high-durometer rubber compound that resists deformation under load. This firmer material minimizes unwanted arm movement during acceleration, braking, and cornering — ensuring your Porsche remains planted, predictable, and precise.
Sold As A Set Of 4
x1 Set Required Per Car.

Fits:

  • 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)

Diagram Ref No 3

What This Product Does:
  • Longitudinal control – they resist fore-aft movement of the trailing arm under acceleration, braking, or road loads.
  • Vibration damping & isolation – they buffer road shock, noise, and vibration from the rear suspension.
  • Suspension geometry stability – they help maintain proper alignment of the rear wheel under load (camber, toe, track).
  • Flex control – heavier-duty bushings reduce unwanted deflection when cornering or under high load.

Symptoms Of Worn Or Failing Trailing Arm Bushings:
  • Rear-end clunks or knocks over bumps or during acceleration / deceleration
  • Loose or vague rear behavior — the rear may feel less planted or drift under load
  • Uneven or accelerated rear tire wear due to shifting alignment or toe changes
  • Poor handling / reduced grip in corners or when the suspension is loaded
  • Vibration or harshness transmitted from rear suspension movements

Why A Heavy Duty Version Matters / Benefits Of Upgrading:
  • Better Handling Feedback & Precision - Less compliance means the rear responds more immediately to inputs — you feel more connection and confidence.
  • Improved Geometry Under Load - During cornering or under dynamic stresses, a stiffer bushing holds alignment (camber, toe) more reliably.
  • Reduced Deflection & Movement - Limits unwanted movement in the rear suspension, especially under acceleration, braking, or high lateral loads.
  • Increased Durability - Heavy-duty compounds resist fatigue, heat, and aging better than soft OEM rubber, especially in performance use.
  • Better Tire Wear Behavior - With more consistent alignment, your rear tires wear more evenly and predictably.
  • Upgraded Feel Without Harshness - While fully rigid mounts can introduce harshness and noise, a quality heavy-duty bushing strikes a better balance: firmer control with acceptable comfort for road use.



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

90133105900
90133105900

The product you are viewing cross references to these numbers