Alternator Conversion Fitting Kit Early to Late Alternator. Porsche 911 turbo 1975-77  ❭  911603FITTINGKIT

Alternator Conversion Fitting Kit 

Upgrade your early Porsche 911 turbo 3.0 (1975-77) with confidence using this OE Match Alternator Conversion Fitting Kit. Specifically designed to enable the installation of the later 12V 75A Internal Regulator Alternator (91160312004), this complete fitting kit contains all the essential OE-style components required to carry out the conversion correctly.

Fits:

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

As Porsche developed the charging system during production, the later internally regulated alternator became the preferred replacement due to its simplified wiring, improved reliability and easier servicing. However, when fitting this later alternator to an early 3.0ltr 930 turbo, several additional installation components are required to ensure correct mounting and electrical integration.

This kit brings together those components in one convenient package, saving time, ensuring compatibility and eliminating the need to source each part individually.

Kit Contents

• Resistor 91164198100 × 1
  
• Air Deflector 91110603305 × 1
  
• Cable Connector 111971511 × 2

These components are required when fitting the later 91160312004 Internal Regulator Alternator to early Porsche 911 turbo 3.0-litre models fitted with the 91160312002 alternator manufactured between 1975 and 1977.

Why Is This Kit Required?

The early Porsche 930 Turbo used a different charging system configuration from the later internally regulated alternator.

When replacing to the later 91160312004 alternator, the additional installation components contained within this kit ensure:

Correct alternator installation. Proper mounting and fitment. Correct electrical connections. Reliable charging system operation. Factory-quality installation. Simplified conversion using the correct parts.

Using the correct installation components helps avoid wiring issues, poor fitment and unnecessary modifications during installation.

Benefits of Upgrading to the Later Internal Regulator Alternator

Many Porsche owners choose to install the later internally regulated alternator because it offers several advantages over the earlier charging system:

• Simplified charging system design.
• Reduced external electrical components.
• Improved charging reliability.
• Easier servicing and maintenance.
• Better parts availability.
• Proven long-term durability.
• Direct compatibility when used with this fitting kit.

This conversion has become a popular solution during engine rebuilds, electrical restoration projects and preventative maintenance.

Benefits

• Saves time sourcing individual parts.
• Ensures correct installation of the later alternator.
• Helps maintain reliable charging performance.
• Supports factory-quality fitment.
• Reduces installation complications.
• Ideal during alternator replacement or engine restoration.

When replacing the alternator, it is also recommended to inspect the alternator drive belt, fan housing, charging cables, battery terminals, earth straps and electrical connectors to ensure the entire charging system operates efficiently.

Why Choose OE Match Electrical Components?

OE Match electrical components are manufactured to deliver dependable quality, accurate fitment and reliable performance for classic Porsche models. This conversion fitting kit has been assembled specifically for owners upgrading early 3.0ltr turbo models to the later internally regulated alternator, providing the correct components required to complete the installation professionally and efficiently. It is an ideal solution for restoration projects, preventative maintenance and charging system upgrades.

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

911603FITTINGKIT

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