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Cross Member & Parts
Auxiliary Support Cross Tube for Cars with Spring Struts
Restore the front suspension structure of your
classic Porsche with this OE Match Auxiliary Support Cross Tube. The cross tube forms part of the front
suspension assembly, providing a strong mounting structure that helps locate
and support suspension components while maintaining correct geometry.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Diagram ref no 1
What Does the Auxiliary Support Cross Tube Do?
The auxiliary support cross tube is mounted across the front underside of the vehicle and forms an important structural part of the suspension system.
Its functions include:
- Supporting front suspension components
- Providing secure suspension mounting points
- Helping maintain correct suspension geometry
- Maintaining structural rigidity across the front suspension
- Supporting accurate steering and suspension operation
Because suspension loads are transferred through this area, the condition and alignment of the cross tube are important for correct handling.
Why Do Auxiliary Support Cross Tubes Fail?
Unlike a normal service component, the cross tube does not have a scheduled replacement interval. Damage is generally caused by age, corrosion, accident damage or previous repairs.
Common problems include:
- Corrosion and rust
- Damage around mounting points
- Distortion caused by accident impact
- Cracks or metal fatigue
- Damage from incorrect jacking or lifting
- Worn or enlarged mounting holes
- Previous poor-quality repairs
- General deterioration on older vehicles
Corrosion is particularly important on early Porsche 911 models, where decades of exposure to moisture and road contamination can weaken suspension mounting areas.
When Should the Cross Tube Be Replaced?
Replacement should be considered if:
- Significant corrosion is present
- Suspension mounting points are damaged
- The cross tube is bent or distorted
- Cracks or structural damage are found
- Suspension geometry cannot be correctly adjusted
- Accident damage has affected the front suspension
- Previous repairs have compromised its strength
- The component is unsuitable for reuse during restoration
Any suspected structural damage should be carefully inspected before the vehicle is returned to the road.
Important Front Suspension Checks
When replacing the auxiliary support cross tube, the surrounding suspension and mounting areas should also be inspected.
Check the spring struts, suspension arms, bushes, ball joints, steering components, mounting hardware and body attachment points for wear, corrosion or damage.
A wheel alignment should be carried out where necessary after suspension components have been replaced or disturbed.
Porsche 911 1969-71 Front Suspension Cross Tubes
Early Porsche 911 suspension components are now several decades old, making corrosion, previous accident damage and general deterioration increasingly common.
The auxiliary support cross tube is an important part of the front suspension structure. Damage or corrosion can affect suspension mounting, alignment and overall front suspension integrity.
During restoration of a 1969, 1970 or 1971 Porsche 911, the cross tube and surrounding suspension mounting areas should be carefully inspected, particularly where corrosion or previous repairs are visible.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90134101304
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 2.0L 01/63-07/68
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90134101302
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 - 1965 to 1989
Porsche 911 turbo - 1975 to 1989
Click 'Zoom in' for large parts diagram.
Diagram ref no 21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90134147500
The product you are viewing cross references to these numbers
- 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 - 2 required per car
Fits:
Porsche 911 - 1965 to 1989
Porsche 911 turbo - 1975 to 1989
Diagram ref no 21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90134147500
The product you are viewing cross references to these numbers
- 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 1965-89
Porsche 930 1975-89
Porsche 914 1970-76
Diagram ref no 11
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91134101310
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 914 (1970-1976)

Fits:
Porsche 911 2.7RS / 2.8 RSR / 2.5ST / 3.0 934
Temperature hardened axle cross member complete with brackets
Cast in magnesium but the 2 holes for rear arms are to be made at installation
Click 'Zoom in' for large parts diagram.Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91134103101
The product you are viewing cross references to these numbers
- 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 914 (1970-1976)

Fits:
Porsche 911/912 1969-89
Porsche 930 1978-79
Porsche 914 1970-76
Click 'Zoom in' for large parts diagram.
Fits to No. 14 on the diagram.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91134190999
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 914 (1970-1976)
- Porsche 912E 4CYL 1976

Fits:
Porsche 912 1968-69
Porsche 911 S/TU/L 1968
Porsche 911 T/E/S 1969-73
Porsche 911 1974-89
Porsche 911 (930) Turbo 1975-89
Porsche 914-6 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90134103301
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 914 (1970-1976)

Fits:
Porsche 912 1968-69
Porsche 911 S/TU/L 1968
Porsche 911 T/E/S 1969-73
Porsche 911 1974-89
Porsche 911 (930) Turbo 1975-89
Porsche 914-6 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90134103301
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 914 (1970-1976)
Genuine Porsche front crossmember reverse lever adjusting screw is used as part of the front torsion bar suspension assembly for setting and maintaining suspension geometry and preload.
Sold each, 2 required per vehicle.
Fits:
Porsche 912 1969
Porsche 911 T/E/S 1969 - 1973
Porsche 911 1974 - 1989
Porsche 911 (930) Turbo 1975 - 1989
Porsche 914 1970 - 1976
Diagram ref no 20
The front crossmember reverse lever adjusting screw enables precise calibration of the torsion bar settings and front suspension geometry. It threads into the reverse lever to set the correct preload on the torsion bars and helps establish the proper ride height and alignment. Accurate adjustment of this screw is essential for achieving balanced handling, even tyre wear, and responsive steering.
Function:
Installed on the front suspension crossmember, the adjusting screw:
• Secures and adjusts the reverse lever position
• Sets torsion bar preload
• Helps maintain correct ride height and alignment
• Ensures stable, consistent front suspension dynamics
As an OE item, it is made from materials that meet Porsche’s mechanical strength and wear criteria, ensuring long-term reliability even under repeated adjustments and road stresses.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91134111502
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 914 (1970-1976)
This is an replacement adjusting screw for the front crossmember reverse lever - a critical component in the torsion bar suspension system of classic Porsche vehicles. Its mounted on the front crossmember to calibrate the reverse lever position and torsion bar preload.
Sold each, 2 required per vehicle.
Fits:
Porsche 912 1969
Porsche 911 T/E/S 1969 - 1973
Porsche 911 1974 - 1989
Porsche 911 (930) Turbo 1975 - 1989
Porsche 914 1970 - 1976
Diagram ref no 20
The front crossmember reverse lever adjusting screw provides fine-tuning of the reverse lever assembly on the front suspension crossmember. It enables precise adjustment of the torsion bar preload and suspension geometry, which affects ride height, wheel alignment, and handling balance.
This screw works within the front crossmember mechanism to establish the correct positioning of the reverse lever, which in turn ensures that the torsion bars and lever arms are calibrated accurately to support the vehicle’s weight and suspension movements.
The front suspension crossmember and associated reverse lever mechanism play a key role in how the vehicle’s torsion bars and front suspension geometry behave. A worn, damaged, or incorrect adjusting screw can cause:
• Improper torsion bar preload
• Uneven or incorrect ride height
• Poor alignment and handling issues
• Uneven tyre wear
• Steering imbalance
Replacing a worn or corroded component restores proper adjustment capability, enhances suspension accuracy, improves handling response, and helps maintain original suspension setup.
Replace this adjusting screw if:
• Threads are damaged, corroded, or worn
• Adjustment becomes difficult or imprecise
• You’re performing front suspension removal or rebuild
• Ride height or alignment cannot be correctly set
• Front crossmember or torsion bar work is underway
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91134111502
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 914 (1970-1976)
This Genuine Porsche hexagon-head bolt is used to secure the rear suspension cross-member on Porsche 996 and 997 models.
Sold each, required 4 per vehicle.
Fits:
Porsche 996 1998 - 2004 all models
Porsche 997.1 2005 - 2008 all models
Porsche 997.2 2009 - 2012 all models
Diagram ref no 4
Bolts securing suspension cross-members endure constant dynamic stress, heat, and exposure to moisture. Over time, this can lead to corrosion, stretching, or loss of clamp force, potentially compromising alignment and safety.
When to Replace:
• During rear subframe or cross-member removal/reinstallation
• If original bolts show corrosion, thread damage, or deformation
• When performing a complete suspension overhaul or alignment service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90037813901
The product you are viewing cross references to these numbers
Porsche Suspension Cross Member & Parts | Design911 Precision Components for Strength, Alignment & Stability
The suspension cross member — also known as a subframe or suspension carrier — is a structural component that supports key elements of your Porsche’s chassis, including the suspension arms, steering rack, and drivetrain mounts. It provides rigidity, alignment, and load distribution, ensuring that suspension geometry remains consistent under braking, cornering, and acceleration. A properly aligned and structurally sound cross member is essential for precise handling, comfort, and safety.
At Design911, we supply a full range of suspension cross members, mounts, and associated components, engineered for accuracy, strength, and corrosion resistance. Manufactured using reinforced steel or high-grade aluminium, these parts are designed to maintain chassis integrity and suspension precision. Ideal for repairs, restorations, or performance upgrades, our cross members and hardware deliver long-lasting strength and the stability your Porsche deserves.
What Do Suspension Cross Members Do?
The cross member serves as the main support structure for the suspension system, keeping all critical components properly aligned and securely mounted.
Core Functions:
• Support the lower suspension arms, steering rack, and drivetrain.
• Maintain correct suspension geometry for accurate alignment.
• Distribute loads evenly across the chassis.
• Increase torsional rigidity for better handling stability.
• Reduce vibration and noise by isolating components.
A strong, undamaged cross member ensures that your Porsche’s suspension and steering systems work together seamlessly for maximum performance and comfort.
Why Do Suspension Cross Members and Parts Fail or Degrade?
Despite their strength, cross members are subject to stress, corrosion, and fatigue over years of driving, especially in high-performance or harsh environments.
Common Causes of Failure Include:
• Corrosion from road salt, water, or debris.
• Impact damage from potholes, kerbs, or collisions.
• Metal fatigue or cracking under extreme stress.
• Worn or damaged mounting bushes or bolts.
• Misalignment caused by chassis distortion or improper repairs.
When these issues arise, drivers may notice poor handling, uneven tyre wear, clunking noises, or instability — all signs that inspection or replacement is required to maintain safety and control.
Why Replace or Upgrade Your Porsche Suspension Cross Member?
Replacing a damaged or corroded cross member restores chassis alignment, strength, and suspension performance. Upgraded or precision-engineered replacements ensure long-term reliability, improved rigidity, and enhanced handling characteristics.
Key Benefits:
• Restores correct suspension geometry and alignment.
• Improves handling, safety, and steering response.
• Reduces vibration and structural flex.
• Constructed from corrosion-resistant steel or aluminium.
• Fits Porsche 911, 944, 968, Boxster, Cayman, Cayenne, Macan, and Panamera
models.
• Ideal for restorations, structural repairs, or performance upgrades.
Design911’s Porsche suspension cross members and parts combine precision engineering and durability, ensuring your Porsche remains strong, balanced, and responsive on every drive.
Highlights
• Premium Porsche suspension cross members, mounts, and
bolts.
• High-strength steel and alloy construction.
• Precision-engineered for alignment and rigidity.
• Enhances suspension geometry and vehicle balance.
• Suitable for both classic and modern Porsche models.
• Perfect for restoration, servicing, or performance tuning.