Rear Trailing Arm
- 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)
 
                    
Fits:
Porsche 911 1965-73
Porsche 912
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133156100
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
 
                    Fits:
Porsche 911 1974-89 (not Turbo)
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91133156130
The product you are viewing cross references to these numbers
- 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
 
                    Fits:
Porsche 911 1974-89 (not Turbo)
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91133156130
The product you are viewing cross references to these numbers
- 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
 
                    Sold as a pair
Fits:
Porsche 911 - 1971 to 1973
Upgrade and strengthen the rear trailing arms with these weld on gusset plates.
Welds to diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91133105420
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
 
                    Rear Axle.

Fits:
Porsche 911 1978-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90008209203
The product you are viewing cross references to these numbers
- 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 1978-1989 3.3L Turbo (930)
 
                    A rubber-bonded bushing pressed into the upper mount of the rear trailing arm. It isolates noise/vibration and fixes the trailing arm’s pivot geometry so toe/camber stay stable under load. Porsche lists it for 1965–89 911/912 (also 912E and 930). Four are used per car.

Fits:
Porsche 911/912/930 1965-89
• Club Sport version
• 30% stiffer than OE part
• Guaranteed fitment
• OE trailing arm bushing dimensions for correct alignment and smooth ride
• Restores proper suspension handling and braking stability
• High-quality heat-resistant elastomer and metal materials for maximum durability
• 24 Month Unlimited Mileage Warranty
Mount Hole Quantity: 1
Inside Diameter: 14.12 MM
Outside Diameter: 46 MM
Mount Hole Diameter: 34.4 MM
Material: Steal
Colour: Gold
Why replace them and typical age-related failures: Cracked or perished rubber → rear-end clunks, squeaks, and “rear-steer” feel on throttle/brake. Ovalised inner sleeve → unstable alignment; car wanders and tramlines. Oil/heat-swollen rubber → excess compliance and braking instability. Replacing restores correct alignment, handling and braking stability
Common issues you’ll see Play at the trailing-arm pivot (visible with a pry bar); torn rubber. Uneven rear-tyre wear (inside edges from toe change under load). Noisy rear suspension over small bumps. Alignment won’t hold after a set-up (bushings deflect back).
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133105900HD
The product you are viewing cross references to these numbers
- 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)
 
                    SET OF 4 for TWO Arms.
OEM Part Number: 90133105900

Fits:
Porsche 911 1970-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Powerflex Heritage Collection. For Modern Day Classics.
A range of bushes engineered for the road to compliment your classic car.
POWERFLEX Heritage Collection bushes are manufactured using modern day materials with properties biased for the road. These dark grey coloured bushes will improve any collector's car, whilst retaining the same standard appearance of a rubber bush.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PFR57-410H
The product you are viewing cross references to these numbers
- 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)
 
                    
Fits:
Porsche 911 1978-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90091009402
The product you are viewing cross references to these numbers
- 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 1978-1989 3.3L Turbo (930)
PAIR, 1 pair required per car

Fits:
Porsche 911/912/930/914 1965-89
Performance
Today's sticky tire compounds generate corner loads that easily compress factory rubber bushings causing wandering alignment settings. The result is that camber and toe change unpredictably, making steering imprecise and the car difficult to drive fast.
Monoball Cartridges replace compliant factory rubber bushings with hardened-steel spherical bearings. Unlike poly bushings that bind and resist movement, true spherical bearings allow free motion on multiple axis.
• Precise, razor sharp handling
• Holds alignment settings true
• Weather-Sealed for long life
• Eliminates camber loss due to compression
• Extremely low friction
Weather Seals
Our proprietary-design Monoball cartridges have optional weather seals to keep dirt out and extend product life.
This is the only Monoball suitable for street or extended track use. Dirt and water contaminate ordinary products and accelerate wear.
Fitment
Front monoballs fit easily into the stock camber plates of 67-89 911/912/930 cars (911 341 018 00). Cars with pre-67 camber plates are recommended to switch to a 67-89 camber plate for fitment. 65 cars without camber plates require grinding to enlarge the strut top opening to allow fitment of the cartridges.
Easy Bushing Replacement How-To
Your existing bushings are pressed in place, they will need to be pressed out, and you will need to press in the new bushings but it's really easy when you have the right tools. To ease and speed the bushing removal and installation process without using a shop press please see our purpose designed Split Bushing Removal Tool and our Bushing Installation tool.
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
2020901
The product you are viewing cross references to these numbers
- 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)
 
                    Sold each.
Fits: 
Porsche 911/912 1969
Porsche 911 1970-71
Click 'Zoom in' for large parts diagram.
Diagram Ref No 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
WHT001938
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
 
                    SET OF 4 for 2 Arms.
OEM Part Number: 90133105900

Fits:
Porsche 911 1970-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Powerflex. Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:
- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsitive steering
- Longer service life of suspension components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PFR57-410
The product you are viewing cross references to these numbers
- 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)
 
                    SET OF 4 for TWO Arms.
OEM Part Number: 90133105900

Fits:
Porsche 911 1970-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Powerflex Black Series - Designed for the Track - Ready to Race - Engineered to be the best.
Powerflex Black Series bushes are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry. This compound can be up to 80% more resistant to load than standard rubber and 25% stiffer than our purple performance material.
If your requirements are purely for the ultimate in handling and chassis performance then Powerflex Black Series are unique, offering the most precise and accurate alignment for your chassis.
Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:
- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsitive steering
- Longer service life of suspension components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PFR57-410BLK
The product you are viewing cross references to these numbers
- 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)
 
                    Replacement for Porsche parts No. 90133105900
SET OF 4

Fits:
Porsche 911 1970-89
Porsche 912
Porsche 911 SWB
Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:
- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components.
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
SPF0988K
The product you are viewing cross references to these numbers
- 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)
 
                    
Fits:
Porsche 911/912 1965-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133105900
The product you are viewing cross references to these numbers
- 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)
 
                    A rubber-bonded bushing pressed into the upper mount of the rear trailing arm. It isolates noise/vibration and fixes the trailing arm’s pivot geometry so toe/camber stay stable under load. Porsche lists it for 1965–89 911/912 (also 912E and 930). Four are used per car.

Fits:
Porsche 911/912/930 1965-89
Why replace them and typical age-related failures: Cracked or perished rubber → rear-end clunks, squeaks, and “rear-steer” feel on throttle/brake. Ovalised inner sleeve → unstable alignment; car wanders and tramlines. Oil/heat-swollen rubber → excess compliance and braking instability. Replacing restores correct alignment, handling and braking stability
Common issues you’ll see
Play at the trailing-arm pivot (visible with a pry bar); torn rubber.
Uneven rear-tyre wear (inside edges from toe change under load).
Noisy rear suspension over small bumps.
Alignment won’t hold after a set-up (bushings deflect back). 
Click 'Zoom in' for large parts diagram.
Diagram Ref No 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133105900
The product you are viewing cross references to these numbers
- 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)
Porsche Rear Trailing Arms | Design911 Suspension Components for Stability, Alignment & Handling Precision
Rear trailing arms are vital components in your Porsche’s suspension system, connecting the rear axle or hub carrier to the chassis. They control the rear wheel’s forward and backward motion while maintaining correct alignment, geometry, and stability during braking, cornering, and acceleration. Properly functioning trailing arms are key to preserving the balance, grip, and ride comfort Porsche is famous for.
At Design911, we supply a complete range of rear trailing arms, bushes, and associated components engineered for precision fitment, strength, and durability. Crafted from high-quality steel or aluminium alloys, our trailing arms provide the perfect combination of rigidity and lightweight performance. Whether for routine servicing, restoration, or track-focused upgrades, our parts restore suspension integrity and improve both comfort and control.
What Do Rear Trailing Arms Do?
Trailing arms form a structural link between the chassis and the rear wheel assembly, ensuring that the wheel remains correctly positioned and aligned through all driving conditions.
Core Functions:
• Control rear wheel movement under acceleration and braking.
• Maintain correct rear axle geometry and wheel alignment.
• Absorb road shocks to improve comfort and stability.
• Enhance traction, grip, and straight-line performance.
• Support suspension articulation and chassis balance.
High-quality rear trailing arms keep your Porsche’s suspension geometry stable — ensuring predictable, precise handling on both road and track.
Why Do Rear Trailing Arms Fail or Degrade?
Trailing arms operate under constant load and movement, making them vulnerable to wear, corrosion, and metal fatigue over time.
Common Causes of Failure Include:
• Worn or cracked bushings leading to excess play.
• Corrosion or rust weakening the arm structure.
• Impact damage from road debris or kerb strikes.
• Metal fatigue from repeated high-load driving.
• Loose or damaged mounting bolts affecting alignment.
When trailing arms fail, symptoms include clunking noises, unstable handling, uneven tyre wear, and poor rear-wheel alignment — making timely replacement essential for performance and safety.
Why Replace or Upgrade Your Porsche Rear Trailing Arms?
Replacing worn or damaged trailing arms restores suspension geometry, stability, and control. Upgraded performance arms enhance chassis stiffness, adjustability, and precision — ideal for spirited driving or motorsport use.
Key Benefits:
• Restores suspension alignment and stability.
• Improves handling precision and cornering balance.
• Eliminates vibration, noise, and excess rear-wheel play.
• Constructed from corrosion-resistant, high-strength materials.
• Fits Porsche 911, 944, 968, Boxster, Cayman, Cayenne, and Macan models.
• Ideal for servicing, performance upgrades, or full restorations.
Design911’s Porsche rear trailing arms deliver exceptional engineering, ensuring your Porsche drives with the strength, precision, and control it was designed for.
Highlights
• Premium Porsche rear trailing arms and mounting
components.
• Precision-engineered for suspension accuracy and strength.
• Restores handling, alignment, and ride comfort.
• Available in standard or performance-grade materials.
• Suitable for both classic and modern Porsche models.
• Perfect for restoration, servicing, or track preparation.
 
 
                 
                        
                        
                            
 
                             
                             
                         
                             
                             
                             
                             
                             
                             
                             
                         
                             
                             
                             
                         
                             
                             
                             
                             
                             
                         
                             
                             
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                