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Porsche // 993 (911) (1994-1998) // Any
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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
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 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Front Lower Wishbone
Restore the exceptional handling and driving precision of
your Porsche 993 with this OE Match Front Lower Wishbone. Designed specifically for Porsche 993
Carrera models produced between 1994 and 1997, this critical suspension
component helps maintain correct wheel alignment, steering response and
suspension geometry, ensuring your air-cooled 911 continues to perform as
Porsche intended.
Fits:
Porsche 993 (911) C2 1994-97
Porsche 993 (911) C4 1994-97
Porsche 993 (911) C2S 1994-97
Porsche 993 (911) C4S 1994-97
Porsche 993 (911) TURBO 1994-96
Porsche 993 (911) GT2 1994-97
Porsche 993 (911) TURBO S 1994-97
Diagram ref no 12
Manufactured to OE specifications, this replacement lower wishbone delivers the correct fit, strength and durability required for both daily driving and spirited road use. Whether you are refreshing a tired suspension, correcting handling issues or undertaking a complete restoration, replacing worn suspension arms is essential for preserving safety, comfort and performance.
What Does the Front Lower Wishbone Do?
The front lower wishbone, often referred to as a control arm, forms a vital part of the Porsche 993 front suspension system. It connects the wheel carrier assembly to the chassis while controlling wheel movement during suspension travel.
Working together with suspension bushes, ball joints,
dampers and steering components, the lower wishbone helps to:
- Maintain accurate wheel alignment.
- Control suspension movement and geometry.
- Improve steering precision and feedback.
- Enhance vehicle stability under braking and cornering.
- Reduce unwanted wheel movement.
- Deliver predictable handling and road holding.
The Porsche 993 introduced significant suspension improvements over previous generations, making properly functioning wishbones critical to maintaining the vehicle's renowned driving characteristics.
Why Do Front Lower Wishbones Fail?
Over time, front suspension components are subjected to
significant mechanical stress and environmental exposure. Common causes of
wishbone failure include:
- Corrosion caused by moisture and road contaminants.
- Impact damage from potholes, kerbs or road debris.
- Metal fatigue from years of suspension loading.
- Distortion following accidents or suspension impacts.
- Wear around bush and mounting locations.
- Excessive stress caused by worn bushes or ball joints.
As Porsche 993 models continue to mature as modern classics, original suspension components often show signs of wear that can negatively affect ride quality and handling performance.
When Should a Front Lower Wishbone Be Replaced?
The front lower wishbone should be inspected regularly as
part of routine suspension maintenance. Replacement may be necessary if you
experience:
- Clunking or knocking noises from the front suspension.
- Excessive play in suspension components.
- Uneven tyre wear. Poor steering response or vague handling.
- Vehicle pulling to one side.
- Alignment issues that cannot be corrected.
- Visible corrosion, cracking or impact damage.
- During a complete front suspension rebuild.
Replacing worn wishbones restores suspension accuracy, improves steering feel and helps return the vehicle to factory handling standards.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99334101
The product you are viewing cross references to these numbers
- Porsche 993 (911) RS 1994-97
Left or Right
Porsche 993 RS 1994-97
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99334101
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Porsche 993 1994-97
This part number has been superseded from previous numbers:
- 99333104101 (LEFT) / 99333104201 (RIGHT)
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99333104
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Fits:
Porsche 964 1989-94
Porsche 993 1994-98
Fits to No 12 on the diagram.
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.
PUBUSHKIT5
The product you are viewing cross references to these numbers
This kit is comprised of the following items: