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Porsche > Suspension & Axle > Anti Roll Bar >

Rear Anti-Roll Bar, 21MM. Porsche 911 Carrera 3.2L 1987-89  ❭  91133370113

Rear Anti-Roll Bar, 21MM. Porsche 911 Carrera 3.2L 1987-89 - 91133370111, 91133370113
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91133370113/1
Product Information
Product Information
Rear Anti-Roll Bar, 21MM.

This Rear Anti-Roll Bar, 21MM is a OE MATCH suspension component designed to enhance vehicle stability and handling by reducing body roll during cornering. Engineered specifically for classic Porsche 911 models, this anti-roll bar features a 21mm diameter, providing increased stiffness for improved control and more responsive driving dynamics.

Fits:

  • Porsche 911 1987-1989 3.2L G50  

Diagram Ref No 10

What This Product Does:
  • Reduces body roll during cornering and directional changes
  • Improves handling stability and overall vehicle control
  • Enhances tyre contact with the road for better grip
  • Balances suspension movement between left and right wheels
  • Provides increased stiffness for more responsive performance  

Symptoms Of Wear Or Failure:
  • Excessive body roll when cornering
  • Loose or unstable handling feel
  • Clunking or knocking noises from the rear suspension
  • Uneven tyre wear due to reduced stability
  • Reduced cornering confidence and performance

Why Replacement Matters:
  • Restores proper handling and stability
  • Improves cornering control, especially at higher speeds
  • Prevents additional wear on suspension components and tyres
  • Eliminates unwanted noise and looseness
  • Maintains or enhances original suspension performance characteristics



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Related, superseded, cross reference or alternative numbers for comparison.

91133370113
91133370111
91133370113

The product you are viewing cross references to these numbers
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Lateral support clamp anti roll bar. Various sizes for Porsche
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Product Information
Product Information
Lateral support clamp anti roll bar. 

powerflex

Anti-Roll Bars (ARB’s) play an important role in a vehicle’s suspension system, helping to reduce body roll by transferring cornering load from one side of a vehicle to the other.

Often mounted to the vehicle’s chassis with rubber bushes, these bushes ensure the bar works as intended. To prevent the anti-roll bar from moving laterally within its mounts when turning, OE manufacturers will either bond the bushes to the bar, add dead-stops to the bar itself, or rely solely on the clamping pressure of the rubber.

But what happens when those bushes wear and need to be replaced? Often anti-roll bars with bonded bushes come as a costly complete assembly, so the alternative is to fit a more cost-effective unbonded polyurethane replacement, like the many we offer.

In most cases, friction from the bush will prevent any side-to-side bar movement. Still, when turning aggressively or cornering at higher speeds, a laterally shifting anti-roll bar decreases the efficiency and effectiveness of the bar, changing the dynamics of your suspension system in unpredictable ways. It also poses the risk of the bar fouling on other areas of the vehicle or suspension system.