Distributors

12 Plug Distributor with Anti-Clockwise Rotation - Bosch Style 

Bring modern ignition control to your classic air-cooled Porsche with this advanced 12 Plug Distributor with Anti-Clockwise Rotation, manufactured in the historic style of the legendary Bosch 3.0 RSR ignition distributor. Combining authentic period-correct appearance with state-of-the-art electronic technology, this distributor is the ultimate ignition upgrade for high-performance Porsche 911 Turbo and twin-plug engine applications.

Fits:

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

Designed for enthusiasts seeking improved drivability, performance, engine protection and tuning flexibility, this distributor delivers fully programmable ignition control via Bluetooth smartphone connectivity while retaining the iconic appearance of a classic Bosch motorsport distributor.

Specifically configured as a left-rotating distributor and designed for use with two 3-pin CDI (Capacitive Discharge Ignition) units, this system is ideally suited to twin-plug Porsche engines requiring precise ignition control under both naturally aspirated and turbocharged operating conditions.

What Does the Distributor Do?

The distributor is responsible for accurately delivering ignition signals to the spark plugs at precisely the correct moment throughout the engine's operating range.

In a twin-plug Porsche engine, the distributor controls:

• Spark timing
• Ignition advance curves
• Cylinder firing sequence
• Twin-plug ignition operation
• Engine starting performance
• Engine efficiency
• Throttle response
• Combustion quality

Accurate ignition timing is essential for extracting maximum performance while maintaining reliability and engine safety.

Why Upgrade to a Programmable Distributor?

Traditional mechanical distributors rely on fixed advance mechanisms that offer limited adjustment and tuning flexibility.

This modern programmable distributor provides:

• Fully programmable ignition maps
• Smartphone Bluetooth connectivity
• Boost-sensitive ignition control
• Vacuum advance functionality
• Rev limiter programming
• Integrated immobiliser system
• Improved engine protection
• Greater tuning precision

The result is significantly greater control over engine performance across all operating conditions.

Historic Bosch RSR Appearance

Inspired by the original Bosch 3.0 RSR ignition distributor, this unit preserves the appearance of Porsche's most iconic motorsport ignition systems.

Benefits include:

• Period-correct appearance Motorsport-inspired design
• Authentic engine bay presentation
• Ideal for restorations and restomods
• Combines classic looks with modern technology

Perfect for enthusiasts seeking modern functionality without sacrificing originality.

Bluetooth Smartphone Programming

The integrated Bluetooth system allows ignition maps and distributor functions to be adjusted directly from a smartphone application.

Features include:

• Wireless ignition mapping
• Real-time adjustments
• User-friendly interface
• Quick tuning changes
• No specialist programming equipment required
• Simplified engine setup

This enables precise ignition optimisation for a wide range of engine specifications and operating conditions.

Integrated Pressure Sensor Technology

One of the distributor's most advanced features is the integrated manifold pressure sensor.

A vacuum or boost reference hose can be connected directly from the intake manifold to the distributor.

This allows:

• Vacuum advance functionality
• Boost retard functionality
• Load-sensitive ignition timing
• Improved part-throttle efficiency
• Enhanced turbocharged engine safety
• Optimised combustion characteristics

The system can overlay manifold pressure corrections onto the RPM-based ignition map for highly accurate ignition control.

Integrated Rev Limiter and Immobiliser

The distributor includes advanced engine protection and security features.

Rev Limiter

Benefits include:

• Protects against over-revving
• Safeguards expensive engine components
• Adjustable RPM settings
• Improved reliability

Immobiliser with PIN Protection

Benefits include:

• Enhanced vehicle security
• Smartphone programmable access
• Additional theft protection
• Discreet integrated functionality

Why Choose This Distributor?

This distributor delivers capabilities traditionally only available through standalone engine management systems.

Benefits include:

• Historic Bosch appearance
• Modern programmable technology
• Bluetooth smartphone control
• Vacuum advance functionality
• Turbo boost retard capability
• Twin-plug compatibility
• Integrated rev limiter
• Integrated immobiliser
• Precise ignition control
• Porsche-specific design

It represents one of the most advanced distributor-based ignition solutions available for air-cooled Porsche engines.

This OE Match Bosch-style 12-plug ignition distributor, it combines anticlockwise rotation with smartphone-based ignition programming.

Fits

• Porsche 911 SC - 1978 to 1983
  
  
  

What This Product Does

The distributor directs ignition pulses to the spark plugs in firing sequence. Its appearance follows the period Bosch 3.0 RSR design, while Bluetooth connectivity allows the ignition map to be configured through an app.

Smartphone controls also provide an adjustable engine-speed limit and a PIN-operated immobiliser. This version needs two 3-pin HKZ ignition units; confirm that the intended ignition installation matches this requirement before fitting.

Functions

• Distributes ignition pulses across a 12-plug installation.
• Allows ignition-map adjustment through a Bluetooth-connected app.
• Provides smartphone adjustment of the engine-speed limit.
• Enables PIN-controlled immobiliser activation and deactivation.
  
  

Technical Details

• Application: Porsche 911 SC, 3.0L, 1978–1983.
• Rotation direction: anticlockwise.
• Configuration: 12-plug distributor.
• Styling reference: Bosch 3.0 RSR.
• Ignition requirement: two 3-pin HKZ units.
• Control interface: smartphone app using Bluetooth.
  
  

Symptoms of Fault

• Uneven idling or intermittent misfiring.
• Difficulty starting or unexpected stalling.
• Hesitation or backfiring during acceleration.
• Unstable timing readings during inspection.
• Excessive movement at the distributor shaft or rotor.
• Internal moisture, corrosion or oil contamination.

These signs are not exclusive to distributor faults. Inspect the plugs, leads, coil, wiring and electrical connections before deciding which component needs attention.

Why Replacement Matters

Wear within a distributor can disturb spark distribution and ignition timing. Renewing a confirmed faulty assembly addresses defects that changing only the cap or rotor may leave unresolved. For an engine rebuild or ignition conversion, check the complete ignition arrangement rather than assuming compatibility from the vehicle model alone.

FAQs

Is this a Bosch-manufactured distributor?
The supplied brand is OE Match; Bosch style describes its period-inspired appearance.

How is the ignition map adjusted?
Programming is carried out through a smartphone app connected by Bluetooth.

Which ignition units does it require?
This configuration requires two 3-pin HKZ units.

Will a new cap and rotor resolve shaft wear?
No. Internal mechanical wear requires separate assessment, even if the service components are renewed.

Check fitment for your specific vehicle (model, year, engine) before ordering.

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

90160202510

The product you are viewing cross references to these numbers

12 plug distributor, Magneti Marelli style. Porsche 911 1965 to 1971

Fits:
Porsche 911 2.0ltr - 1965 to 1969 
Porsche 911 2.2ltr - 1970 to 1971

This distributor is made in the historical design of the original Magneti Marelli ignition distributor and combines the latest technology with an authentic look. 

It was installed at the factory on the 906, 911R, 914/6 GT and 911 ST and the ignition map is easily and freely programmable via an app and Bluetooth. 

In addition, an immobilizer can be locked/unlocked with a PIN and a speed limiter can also be set easily via a smartphone. 

This version requires two 3-pin HKZ devices but it fits all engines from 1965 to 1971, so from the 2.0ltr to the 2.2ltr 

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

90160202500

The product you are viewing cross references to these numbers

OE Match Bosch-style 12-plug distributor, featuring clockwise rotation. Bluetooth app control allows ignition-map programming, with styling based on the Bosch 3.0 RSR distributor.

Fits

• Porsche 911 - 1972 to 1989
• Excluding 911 SC 3.0ltr
  
  

Confirm the engine specification and ignition arrangement rather than relying on the model-family dates alone.

Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

This distributor routes ignition pulses to the spark plugs in the required firing sequence. It combines a period-inspired housing design with programmable ignition control, allowing the ignition map to be configured through a Bluetooth-connected smartphone app.

Functions

• Distributes ignition output across a 12-plug installation.
• Allows app-based adjustment of the ignition map.
• Provides smartphone control of the rev-limit setting.
• Offers PIN-controlled immobiliser locking and unlocking.
  
  

Technical Details

• Brand: OE Match; Bosch-style design, not identified as Bosch manufacture.
• 12-plug configuration with clockwise rotation.
• Appearance draws on the historic Bosch 3.0 RSR unit.
• Requires a pair of three-pin HKZ ignition units.
• Bluetooth connection supports smartphone app programming.
• Programmable rev limiter and PIN-operated immobiliser.
  
  

Symptoms of Fault

Distributor-related faults can present as difficult starting, uneven idling, intermittent misfiring, hesitation or stalling. Unsteady timing readings, excessive shaft movement, internal moisture or damaged cap contacts warrant inspection. These signs do not establish that the complete distributor needs replacement.

Why Replacement Matters

Mechanical wear or electrical deterioration can disrupt spark distribution and timing consistency. Inspect the cap, rotor, leads, plugs, wiring and associated ignition equipment before deciding which components need renewal. For a rebuild or ignition conversion, verify the clockwise drive requirement, HKZ arrangement and intended ignition settings before installation.

FAQs

Is this suitable for the 911 SC 3.0?
No. The supplied application specifically excludes that engine.

What ignition equipment does it require?
This version needs two three-pin HKZ units; check the existing installation before selecting it.

Can the ignition settings be changed by smartphone?
Yes. Bluetooth app access provides ignition-map programming, rev-limit adjustment and PIN-based immobiliser control.

OE Match offers this clockwise-rotating, Magneti Marelli-style 12-plug distributor. Bluetooth connectivity allows ignition-map programming through a smartphone app.

Fits

• Porsche 911 - 1972 to 1989
• Excluding 911 SC 3.0ltr

The model groups above must be read alongside the specific 1972–1989 application and SC exclusion. Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

The distributor routes ignition pulses to the spark plugs in the required firing sequence. This 12-plug version combines electronically programmable ignition control with styling based on the period Magneti Marelli distributor, rather than relying solely on a fixed ignition calibration.

Its app provides access to ignition-map settings through Bluetooth. Smartphone controls also allow a speed limit to be configured and the immobiliser to be secured or released using a PIN.

Functions

• Distributes ignition pulses across a 12-plug arrangement.
• Allows ignition-map adjustment through the connected app.
• Provides a smartphone-configurable speed limiter.
• Supports PIN-controlled immobiliser operation.
  
  

Technical Details

• Rotation direction: clockwise.
• Requires two 3-pin HKZ ignition units.
• Specified engine coverage extends from 2.4ltr to 3.2 Carrera, subject to the stated exclusion.
• Appearance follows the Magneti Marelli 2.8/3.0 RSR distributor design.
• Historical context: the original distributor design was factory-fitted to the 911 ST 2.5ltr and 2.8ltr 911 RSR.
• Ignition-map programming uses an app and Bluetooth connection.
  
  

Symptoms of Fault

• Misfiring during acceleration or under load.
• Uneven idling, difficult starting or unexpected stalling.
• Hesitation or backfiring.
• Unstable timing readings during inspection.
• Noticeable play at the distributor shaft or rotor.
• Moisture, oil contamination or electrical tracking inside the cap.
  
  

Why Replacement Matters

Wear within a distributor can disturb ignition timing or interrupt spark distribution. A replacement may be appropriate when inspection confirms shaft wear, housing damage or an internal fault that cannot be resolved through service components. Check the leads, plugs, ignition units and electrical connections first, as faults elsewhere can produce similar running problems.

FAQs

Will a cap and rotor repair every distributor fault?
No. These components cannot correct wear in the shaft, bushes or housing; inspect the complete assembly before deciding what to replace.

What should be checked before installation?
Confirm the engine application, clockwise drive requirement and compatibility with two 3-pin HKZ units. The 911 SC 3.0ltr is excluded.

How are the electronic settings adjusted?
A smartphone app communicates over Bluetooth for ignition-map programming, speed-limiter adjustment and PIN-based immobiliser control.

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

90160202500

The product you are viewing cross references to these numbers

Distributor cap 12 plug Bosch style. 

Fits:
Porsche 911 RS / RSR / ST / 934

Produced in the original manufacturing process using the original Bakelite material. This material was specially developed in co-operation with the OEM manufacturers for the HKZ ignition system and offers the best insulation values and extreme temperature resistance.
The caps are elaborately produced in accordance with the manufacturer's specifications

Reference number:
Bosch ZV/8 970
Bosch D 237 012 178

Porsche 911, 911 RS, 911 RSR, 911 ST, 917, 935
Material - Bakelite

• New production in true to original design
• Based on NOS (New Old Stock) components and own construction drawings

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

90160202520

The product you are viewing cross references to these numbers

Distributor Block-Off & Conversion Kits for Classic Porsche 911
The Distributor Plug Kit for classic Porsche 911 covers the precise scenario where the engine’s original distributor hole is no longer used—often when converting to coil-on-plug ignition or eliminating the mechanical distributor altogether.
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 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)

Blanks off distributor hole in crankcase, highlighted in green

This high-quality kit is CNC-machined from aluminium, anodised silver, and features dual O-ring seals to ensure a secure, leak-free block-off of the distributor housing. It also incorporates a threaded pulling hole so the plug can be removed easily if future service is required. The result: a clean, visually refined engine bay appearance and a reliable closure of the distributor port, preserving oil-tight integrity and engine performance.

What the product is:
A plug kit designed specifically for the distributor bore in classic Porsche 911 engines. CNC-machined aluminium block-off plug, enhanced sealing (double O-rings), and serviceable pull-thread.

What it does:

• Seals the distributor aperture when the mechanical distributor has been removed or bypassed.
• Maintains crankcase oil integrity, prevents leaks and contamination ingress.
• Enhances engine bay aesthetics by replacing the open distributor hole with a tailored, polished plug.

Why the original part or configuration fails / needs attention:
When a distributor is removed (for example during coil-on-plug conversion), the hole becomes an unsealed opening—risking oil leakage, contamination ingress (dirt, moisture), crankcase pressure loss, or aesthetic degradation. Older distributor seals and housings may become warped, cracked or worn with age, causing leaks or reduced reliability.

Why this plug kit should be installed / replaced:

• Prevents oil leaks and contamination by securely sealing the engine block in the absence of a distributor.
• Improves engine bay appearance and presents a quality finish.
• Provides a service-friendly solution (threaded pull hole) versus a crude blanking plate or crude cap.
• If you’re converting away from a distributor or refurbishing the engine, installing this kit is a simple, low-cost upgrade to protect longevity and maintain engine integrity.
  

For enthusiasts of the classic Porsche 911 who are performing engine conversions, refurbishments, or upgrades, the Distributor Plug & Block-Off Kit category is essential. These kits are designed for scenarios where the factory mechanical distributor is removed—commonly in coil-on-plug conversions, performance builds, or restoration projects.

What these components do:

• Securely blank off the distributor aperture to maintain crankcase integrity.
• Prevent oil and vacuum/pressure leakage from the engine block.
• Ensure that modifications (such as eliminating the distributor) do not compromise engine performance or reliability.
• Provide a finished, professional engine bay look—no open holes, no unsealed ports, and no risk of contamination.

Why you should replace or install proper kits now:

• Restores or maintains crankcase seal integrity, protecting engine internals from oil and debris.
• Helps maintain correct engine pressure and lubrication environment for optimal performance.
• Minimises risk of leaks, contamination, and subsequent engine damage—especially critical on high-value classic Porsche engines.
• Enhances presentation and value of the engine bay for restoration, show or performance builds.
• Using a quality kit from Design911 ensures you’re installing parts that meet or exceed the factory fit and finish—and are tailored for your classic Porsche 911.

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

AMS9050165

The product you are viewing cross references to these numbers