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Porsche > 911 & 912 (1965-1989) > 911 1974-1977 2.7L / 1976-77 3.0 Carrera > Engine Rebuild Parts > Air Intake & Injection >

Inlet Manifold

Inlet Manifold

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DISPLAYING 17 to 20 (of 20 products)
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Inlet manifold gasket. Porsche 911 74-83 - 93011019712, 71-24706-20, 712470620, 93011019716
2
Inlet manifold gasket. Porsche 911 74-83
Special Order item
93011019716
Product Information
Product Information
Inlet manifold gasket. Sold each.



Fits:
Porsche 911 1974-83

Click 'Zoom in' for large part diagram.
Diagram Ref No 7.

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Related, superseded, cross reference or alternative numbers for comparison.

93011019716
93011019712
71-24706-20
712470620
93011019716

The product you are viewing cross references to these numbers
Intake Manifold Adapter Kit with Fuel Rails for Upgrade to 964/993 Manifolds. Porsche 911 1974–89 - AMS9050074 + AMS9050033, AMS9050075 + AMS9050033, AMS9050076 + AMS9050033, AMS9050077 + AMS9050033, AMS9050078 + AMS9050033
4
Intake Manifold Adapter Kit with Fuel Rails for Upgrade to 964/993 Manifolds. Porsche 911 1974–89
AMS905007
Product Information
Product Information

Adapt Motorsport intake manifold adapter kit with fuel rails for Porsche 911 2.7L, 3.0L and 3.2L engines with two-bolt cylinder heads. It enables later Porsche 964 or 993 3.6 intake manifolds to be installed as part of an electronic fuel injection conversion.

Fits:

  • 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

Kit Contents

  • 6 CNC-machined aluminium intake adapters
  • 4 fuel-rail spacer posts
  • 4 bolts for standard full-length Bosch injectors
  • 12 nuts and washers
  • 2 Fuel rails

What This Product Does

The six adapters provide the interface between an earlier two-bolt Porsche 911 cylinder head and a later 964 or 993 3.6 intake manifold. Each adapter is machined to suit the selected cylinder-head port diameter and transitions to the manifold's 42mm bore.

A compact overall height helps retain clearance around the throttle body, idle air control valve and the upper area of the engine bay. The injector position is aligned above the existing CIS injector relief in the intake port. 

Functions

  • Connects a 964 or 993 3.6 intake manifold to an earlier two-bolt cylinder head
  • Supports conversion from CIS or an earlier injection arrangement to EFI
  • Positions the injector over the original CIS injector-port relief
  • Provides a tapered transition to the 42mm intake-manifold bore
  • Maintains a short installed height for engine-bay clearance
  • Accommodates Bosch injectors with 14mm O-ring fittings


Technical Details

  • Five-axis CNC-machined high-grade aluminium construction
  • Protective anodised finish
  • Designed for Porsche 911 2.7L, 3.0L and 3.2L two-bolt cylinder heads
  • Fuel-rail spacers are marked for adjustment to long, medium or short Bosch injector formats
  • Manifold-side transition is designed for a 42mm bore

Components Not Included

Intake manifolds, rubber joining sleeves, fuel injectors and hose clamps are not supplied with the base adapter kit.

Installation Notes

This component forms part of a custom EFI installation rather than a complete conversion package. Confirm the cylinder-head port diameter, injector length, manifold specification and clearance around the throttle and idle-control components before assembly. Engine-management hardware, fuel delivery components and calibration must be selected for the completed installation.

Velocity stack 38mm. Porsche 911 1965-76 - PCG10832201, 91110832201, 90110093301, 91110832202 - PM-O185-1, PM-O185-0
6
Velocity stack 38mm. Porsche 911 1965-76
91111032202
Product Information
Product Information
Velocity stack - 38mm bore diameter. 
Sold each - 6 required per car



Fits:
Porsche 911 - 1965 to 1969
Porsche 911 E Sportomatic - 1970 to 1973

Enhance the engine compartment of your Classic Porsche with a high-quality reproduction of a long-discontinued Porsche part.
Designed using SolidWorks CAD and precisely molded for a perfect fit with a period correct look
HDPE construction with reinforced mounting tabs

These velocity stacks will fit the following applications:
3 barrel Weber and Zenith Carburetors
Porsche Mechanical Fuel Injection Throttle Bodies

Will not fit PMO Induction Carburetors or EFI Systems

Measures 2” Tall with a 38mm Bore

Sold Individually, Order (6) and Make Your Engine Look Like New

Click 'Zoom in' for large parts diagram.
Diagram ref no 30




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

91111032202
PCG10832201
91110832201
90110093301
91110832202

The product you are viewing cross references to these numbers
Velocity stack 46mm. Porsche 911 1965-76 - PCG10832201, 91110832201, 90110093301 - PM-O185-1, PM-O185-0
6
Velocity stack 46mm. Porsche 911 1965-76
91111032201
Product Information
Product Information
Velocity stack - 46mm bore diameter. 
Sold each - 6 required per car



Fits:
Porsche 911 - 1965 to 1973
Porsche 911 2.7 Carrera MFI - 1974 to 1976

Enhance the engine compartment of your Classic Porsche with a high-quality reproduction of a long-discontinued Porsche part.
Designed using SolidWorks CAD and precisely molded for a perfect fit with a period correct look
HDPE construction with reinforced mounting tabs

These velocity stacks will fit the following applications:
3 barrel Weber and Zenith Carburetors
Porsche Mechanical Fuel Injection Throttle Bodies

Will not fit PMO Induction Carburetors or EFI Systems

Measures 2” Tall with a 46mm Bore 

Sold Individually, Order (6) and Make Your Engine Look Like New

Click 'Zoom in' for large parts diagram.
Diagram ref no 30




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

91111032201
PCG10832201
91110832201
90110093301

The product you are viewing cross references to these numbers
DISPLAYING 17 to 20 (of 20 products)
1 2
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About Inlet Manifold

Air Inlet Manifolds – Precision Airflow Distribution for Porsche Engines

Air inlet manifolds, often referred to as intake manifolds, are vital components in Porsche engines that ensure even air distribution to each cylinder. By controlling the air supply entering the combustion chambers, these manifolds optimise engine breathing, improving fuel efficiency, throttle response, and overall performance.

At Design911, we supply a wide range of genuine and high-quality air inlet manifolds for numerous Porsche models, including  911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each unit is crafted from high-strength materials to deliver consistent airflow, exceptional durability, and precise fitment — maintaining your Porsche’s power and refinement.

What Do Air Inlet Manifolds Do?

The air inlet manifold is a critical part of the intake system that manages and distributes air from the throttle body into the engine’s cylinders. Its functions include:

  • Delivering uniform airflow to each cylinder for efficient combustion.
  • Optimising torque and power output across all engine speeds.
  • Balancing air pressure for smoother idling and acceleration.
  • Enhancing engine cooling and fuel economy through consistent airflow management.

In performance-oriented Porsche engines, the air inlet manifold is carefully tuned to maximise airflow dynamics — contributing directly to the car’s responsiveness and driving feel.

Why Do Air Inlet Manifolds Fail?

Air inlet manifolds operate under constant pressure, heat, and vibration, which can lead to deterioration over time. Common causes of failure include:

  • Cracks or leaks in plastic or aluminium housings due to heat cycling.
  • Carbon buildup restricting airflow through the manifold runners.
  • Faulty gaskets or seals allowing unmetered air to enter the system.
  • Vacuum leaks affecting idle stability and performance.
  • Mechanical damage caused by backfires or overpressure.

Symptoms of a failing air inlet manifold may include rough idling, loss of power, engine misfires, increased fuel consumption, or a check engine light related to air intake irregularities.

Why Replace a Damaged Air Inlet Manifold?

A cracked or leaking air manifold can cause air imbalance, poor combustion, and reduced engine efficiency. Replacing the component restores smooth airflow, optimises fuel economy, and protects engine health.

Benefits of replacement include:

  • Restored airflow and balanced combustion.
  • Improved throttle response and power delivery.
  • Reduced emissions and improved fuel efficiency.
  • Long-term reliability with manufacturer-quality precision.

All air inlet manifolds available at Design911 are made with high-quality materials, precision-engineered sealing surfaces, and optimised airflow geometry — ensuring lasting durability and peak performance in both standard and high-performance Porsche engines.

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