Rear Trailing Arm

Eccentric bolt rear suspension. 
Sold each - 2 required per car

Fits:
Porsche 928 S2 1986
Porsche 928 S4 / 928 GT - 1987 to 1992
Porsche 928 GTS - 1992 to 1995

Diagram ref no 17

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92833165905

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Eccentric bolt rear suspension. 
Sold each - 2 required per car

Fits:
Porsche 928 S2 1986
Porsche 928 S4 / 928 GT - 1987 to 1992
Porsche 928 GTS - 1992 to 1995

Diagram ref no 17

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92833165905

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Eccentric Bolt Rear Suspension.
Restore or maintain the alignment-adjust capability of your Porsche 928’s rear suspension with this eccentric bolt. Designed for the 1986–95 928 series (including S2, S4/GT, GTS), this offers direct replacement for the original rear trailing arm / cross-member adjuster. By repositioning the bolt within its eccentric housing, precise adjustment of camber or toe is achievable — helping lock the rear geometry securely and ensuring accurate, stable handling. Sold individually (two recommended per vehicle), this adjuster bolt is a key maintenance item when refreshing the rear suspension or correcting alignment issues.
Sold Each.
x2 Required Per Car.

Fits:

• Porsche 928S2 4.7L 1984-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram Ref No 17

What This Product Does:

• The eccentric bolt is part of the rear suspension trailing arm / cross-member assembly. It allows for precise adjustment of the rear suspension geometry — typically for camber, toe or longitudinal arm position via the eccentric nature of the bolt.
• Being “eccentric” means the bolt shaft is offset inside its housing so that when the bolt is rotated or repositioned, the trailing arm or mount moves slightly (i.e., the arm moves in or out by a small amount) to allow alignment adjustment.
• It helps set and maintain correct alignment (especially toe and camber) of the rear suspension arms relative to the body and chassis — critical for handling, stability and tyre wear on the 928’s rear suspension.
• When adjusted correctly and properly torqued, the bolt holds the arm or cross-member in its correct location and prevents unwanted movement or geometry shift under load.

Symptoms Of Wear, Mis-Adjustment Or When It Needs Attention:

• The rear alignment is out of specification or cannot be held — especially rear toe or camber that keeps shifting or adjusting.
  
• Unusual tyre wear on the rear tyres — inner or outer edge wear due to geometry changes under load.
  
• Rear instability or vague handling — the car may feel less precise, especially in corners or under acceleration/braking, because the arm location isn’t locked down.
  
• Loose or knocking noises at the rear suspension — if the eccentric bolt or its housing is worn, movement might occur.
  
• During inspection, you find the eccentric bolt is corroded, seized, has stripped threads, or the slot for adjustment is damaged — making accurate adjustment impossible.
• After a suspension service or arm replacement, the bolt or its seat looks malformed or the previous adjustment marks don’t align — indicates repeat adjustments or wear.

Why Replacement Matters:

• Ensuring the eccentric bolt is in good condition and correctly torqued is fundamental to rear suspension geometry, which directly influences handling, stability, and tyre life especially in a high-performance car like the 928.
• A worn or sloppy adjuster can allow the arm to shift under load — reducing precision, creating instability, and wearing tyres faster.
• In restoration or performance setups (larger tyres, stiffer springs, lowered ride height) the demands on geometry tighten — having a firm, adjustable mount is critical.
• Replacing the bolt or upgrade stiff fixation means alignment stays correct for longer, adjustments are reliable, and the suspension performs as designed.
• From a safety viewpoint, correct alignment and arm location help ensure the vehicle behaves predictably in high-load or hard-cornering scenarios.

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92833165905

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Lower rear rocker arm bar
1 Required per side, Price is each



Fits:
Porsche 928 1978-1995

The Porsche 928 lower rear arm can now, finally be renovated with our newly produced rocker arm bar.

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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92833108500

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Lower Rear Rocker Arm Bar.
Renew your Porsche 928’s rear suspension performance with the Lower Rear Rocker Arm Bar.
This essential suspension component connects the lower control arms across the rear axle, managing load transfer and maintaining proper wheel alignment under cornering, braking, and acceleration.
Sold Each.
x2 Required Per Car.

Fits:

• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram Ref No 12

What This Product Does:

• Linking the two sides — It helps distribute load between the left and right lower control arms, improving how the rear axle reacts to cornering or uneven surfaces.
• Maintaining relative geometry — By coupling the motion of the trailing arms, it stabilizes toe and camber changes under load, improving predictability.
  
• Reducing compliance / slack — The bar and its bushings resist unwanted movement in the lower control arms, preventing them from moving independently in undesirable ways.
  
• Improving handling balance — Helps reduce unwanted rear-end movement, contributing to better rear grip and more consistent behavior over bumps or transitions.
  
  

Symptoms / Signs Of Wear Or Failure:

• Clunking, knocking, or banging noises from the rear suspension over bumps or during load shifts
  
• Rear-end looseness or vagueness — the back of the car may feel less planted or predictable
  
• Uneven or accelerated tire wear on the rear, due to geometry variations
  
• Changes in alignment under load, especially during cornering or when the car is unsettled
  
• Loss of consistent rear grip, especially on transitions or during spirited driving
  
  

Why Replacement Matters:

• Restores rear stability and predictability — with rigid, properly bushing-supported linkage, the rear behaves more reliably
  
• Eliminates noise & slack — worn linkage causes audible play; a fresh bar or good bushings cure that
  
• Preserves alignment / geometry under load — prevents misalignment changes mid-corner
  
• Improves overall handling feel — better feedback, confidence, and consistency
  
• Prolongs life of connected parts — less undue stress on arms, mounts, and bushings

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92833108500

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Rear trailing arm link bridge. Porsche 928 1983-95 *Reconditioned

Fits:
Porsche 928 1983-95

Please note:
Reconditioned products are sold on an exchange basis, A surcharge will be held and then refunded when the old one is returned.

The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer. Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer. Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning. All surcharges and exchanges are subject to our terms and conditions.       

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92833111

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Rear trailing arm. Porsche 928 1983-95 *Reconditioned

Fits:
Porsche 928 1983-95

Please note:
Reconditioned products are sold on an exchange basis, A surcharge will be held and then refunded when the old one is returned.

The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer. Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer. Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning. All surcharges and exchanges are subject to our terms and conditions.       

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92834104

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Replacement bush set for lower rocker arm.
2x silent bloc, 1x connecting hose.



Fits:
Porsche 928 1978-95

Click 'Zoom in' for large parts diagram.
Fits to number 12 on diagrams.

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92833108500

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Replacement Bush Set For Lower Rocker Arm.
Bring back the solid, composed feel of your Porsche 928’s rear suspension with this Replacement Bush Set for Lower Rocker Arm.
Located within the rear rocker arm assembly, these bushings control the articulation of the lower suspension arms, maintaining proper geometry and stability during acceleration, braking, and cornering.
Sold As A Set.
x2 Sets Required Per Car.

Fits:

• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Fits On To Diagram Ref No 12

What This Product Does:

• Holds the rocker arm in place, connecting it to the chassis or subframe while allowing pivoting motion.
• Allows the rocker mechanism to articulate smoothly, transferring load between trailing arms or controlling geometry changes.
• Helps maintain consistent suspension geometry under load — i.e. when the car is accelerating, braking, or cornering.
  
• Reduces unwanted movement or slack in the linkage, preserving handling precision and stability.

Symptoms Of Worn Or Damaged Bush:

• Clunking or knocking noises from the rear over bumps or during suspension movement
  
• Rear-end vagueness or instability — the car may feel less planted or “loose”
  
• Uneven or strange tire wear on the rear tires, due to misalignment or shifting geometry
  
• Suspicion that the rear changes behavior under load (e.g. under acceleration / braking)
• Reduced handling precision, especially in transitions or fast directional changes
  
  

Why Replacement Matters:

• Restores handling precision — replaces worn, sloppy bushings with tight, controlled support
  
• Eliminates noise & play — stops knocking or slack in the rocker arm linkage
  
• Protects suspension geometry — ensures the rocker arm acts as intended, maintaining correct alignment under load
  
• Prevents further wear — worn bushings transfer stress to surrounding arms, brackets, or linkage elements
  
• Improves confidence & stability — rear responses become more predictable, especially at higher speeds or in aggressive driving

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Washer For Rear Suspension.
Sold Each.
x4 Required Per Car.

Fits:
Porsche 928 (All Models) 1978>>1995

Diagram Ref No 26

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