Rear Sub Frame
Lower rear rocker arm bar. Porsche 928
- 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
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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12 Month Warranty
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Lower Rear Rocker Arm Bar. Porsche 928
- 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
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.
- 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
- 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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92833108500
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12 Month Warranty
Worldwide Delivery
Replacement bush set for lower rocker arm. Porsche 928
- 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
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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Related, superseded, cross reference or alternative numbers for comparison.
92833108500
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12 Month Warranty
Worldwide Delivery
Replacement Bush Set For Lower Rocker Arm. Porsche 928
- 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
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
- 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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92833108500
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12 Month Warranty
Worldwide Delivery
Porsche Rear Subframe | Design911 Suspension Upgrade Components for Rigidity, Alignment & Handling Precision
The rear subframe is the structural foundation of your Porsche’s suspension and drivetrain assembly. It supports the suspension arms, differential, and other critical components while maintaining precise geometry under high load. A strong, correctly aligned subframe ensures stability, balance, and predictable handling — particularly during hard acceleration and cornering.
At Design911, we supply a comprehensive selection of rear subframes and upgrade components, engineered for precision, strength, and durability. Manufactured from high-tensile steel or lightweight alloy, these subframes provide improved rigidity and reduced flex, ensuring consistent performance in both road and motorsport environments. Whether you’re performing repairs, chassis restoration, or performance upgrades, our rear subframes deliver the structural integrity your Porsche deserves.
What Does the Rear Subframe Do?
The rear subframe acts as a mounting structure that connects the suspension and drivetrain to the vehicle body.
Core Functions:
• Supports rear suspension arms, differential, and drivetrain mounts.
• Maintains accurate suspension geometry under load.
• Distributes forces from cornering, braking, and acceleration.
• Reduces vibration and road harshness through the chassis.
• Improves rigidity and alignment stability for precise handling.
A properly aligned rear subframe keeps your Porsche balanced and composed, ensuring every component performs as designed.
Why Do Rear Subframes Fail or Degrade?
Despite their strength, rear subframes are exposed to high stresses, corrosion, and impact forces — all of which can lead to fatigue or structural weakening.
Common Causes of Failure Include:
• Corrosion or rust weakening metal integrity.
• Cracks or distortion from high-impact loads or collisions.
• Worn mounting bushes causing excessive movement or noise.
• Metal fatigue from performance or track use.
• Improper alignment or installation after suspension work.
Failure can cause instability, poor alignment, vibration, or uneven tyre wear — all of which compromise your Porsche’s safety and handling.
Why Replace or Upgrade Your Porsche Rear Subframe?
Replacing or upgrading the rear subframe restores suspension alignment and chassis rigidity. Performance subframes improve geometry retention and reduce flex, offering sharper handling and more predictable performance.
Key Benefits:
• Restores correct alignment and rear suspension stability.
• Increases chassis rigidity for improved feedback.
• Eliminates vibration and rear-end instability.
• Available in performance-engineered and corrosion-resistant finishes.
• Fits Porsche 911, 944, 968, Boxster, Cayman, Cayenne, and Macan models.
• Perfect for servicing, restorations, or performance suspension builds.
Design911’s Porsche rear subframes deliver precision, strength, and durability — ensuring your Porsche remains responsive, safe, and dynamically balanced.
Highlights
• Premium Porsche rear subframes and upgrade kits.
• Precision-engineered for structural rigidity and alignment accuracy.
• Constructed from high-tensile steel or lightweight alloy.
• Restores handling precision and reduces unwanted flex.
• Ideal for both road and motorsport applications.
• Suitable for servicing, restoration, or performance upgrades.
