Lower Rear Rocker Arm Bar. Porsche 928

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

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Related, superseded, cross reference or alternative numbers for comparison.

92833108500

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