Rear Section

Targa rollover bar bottom filler plate.

Fits:
Porsche 911 Targa - 1965 to 1989

Diagram ref no 3

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Related, superseded, cross reference or alternative numbers for comparison.

90150120

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Torsion Bar Cover Gasket - fits Left or Right Hand Side
Sold each - 2 required per car

Maintain the integrity and protection of your classic Porsche suspension system with this OE Match Torsion Bar Cover Gasket. Designed for Porsche 911 models from 1965 to 1986 fitted with the 915 gearbox, this gasket sits between the torsion bar cover and the vehicle body, helping to create a protective seal around the torsion bar access area.

Fits:

• 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 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)

Diagram ref no 34

Although small and often overlooked, the torsion bar cover gasket plays an important role in preventing moisture, dirt, road debris and contaminants from entering the torsion bar housing area. By helping to seal the cover correctly, it contributes to the long-term preservation of the suspension components and surrounding body structure.

Ideal for restoration projects, suspension overhauls and routine maintenance, replacing the gasket whenever the torsion bar cover is removed helps maintain factory levels of protection and fitment.

What Does a Torsion Bar Cover Gasket Do?

The torsion bar cover gasket creates a sealing barrier between the torsion bar cover and the body shell.

Its primary functions include:

• Helping prevent moisture ingress
• Reducing dirt and debris contamination
• Protecting torsion bar components
• Supporting corrosion prevention
• Improving cover fitment
• Reducing water retention around the torsion tube area
• Maintaining factory sealing standards

The gasket helps ensure the torsion bar access area remains protected from environmental exposure.

Why Do Torsion Bar Cover Gaskets Fail?

Over time, rubber, cork or gasket materials naturally deteriorate due to age and environmental conditions.

Common causes of failure include:

• Age-related hardening
• Compression over time
• Moisture exposure
• Heat cycling
• Damage during removal
• Corrosion around mounting surfaces
• Long-term environmental exposure
• Restoration work requiring removal

Once compressed or damaged, the gasket can lose its ability to seal effectively.

When Should the Gasket Be Replaced?

The gasket should always be inspected whenever the torsion bar cover is removed.

Replacement is recommended when:

• Performing suspension repairs
• Replacing torsion bars
• Carrying out restoration work
• The gasket shows signs of cracking
• The gasket becomes compressed or flattened
• Water ingress is visible
• Corrosion is present around the cover
• The original gasket is missing

Many Porsche specialists automatically replace these gaskets during suspension refurbishment projects.

Why Replacement Matters

A worn or damaged gasket can allow moisture and contaminants to enter the torsion bar housing area.

Benefits of replacement include:

• Improved sealing performance
• Better protection against moisture
• Reduced corrosion risk
• Protection of suspension components
• Improved restoration quality
• Correct cover fitment Long-term durability
• Restoration of factory standards

Replacing the gasket is a simple and cost-effective way to help preserve the rear suspension structure of your classic Porsche.

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

90150475901

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Torsion tube repair panel rear side member.

Fits:
Porsche 911 / 912 - 1965  to 1989

Click 'Zoom in' for large parts diagram.
Diagram ref no 1 (front section of it)

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

91150101

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Tow hook mounting stand, Screw on type.

Fits:
Porsche 911 1965-89

Tow hook mounting stand - weld on design

Fits:
Porsche 911 1965-89