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Gaskets
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
Inlet Manifold Kit - Intake System and Throttle Body Replacement Seal Kit
This comprehensive inlet manifold kit for the Porsche 997.2
provides a complete solution for restoring intake system sealing and throttle
control performance.
The kit includes:
6 x Inlet manifold gaskets
2 x Distributor tube rubber seals
1 x Throttle
body seal
14 x Mounting bolts
Fits:
Porsche 997 MKII Carrera C2 3.6L 2009-12
Porsche 997 MKII Carrera C4 3.6L 2009-12
Porsche 997 MKII Carrera C2S 3.8L 2009-12
Porsche 997 MKII Carrera C4S 3.8L 2009-12
Diagram ref no 2, 3, 8 and 12
Designed for precise fitment on Porsche 997.2 models, this kit ensures proper airflow management, secure installation and long-term reliability.
What the Inlet Manifold and Throttle Body Do
The inlet manifold distributes air evenly to each cylinder of the engine. It plays a critical role in maintaining balanced airflow and supporting optimal combustion.
The inlet manifold gaskets create airtight seals between the manifold and cylinder head, preventing unmetered air from entering the system. The distributor tube rubber seals prevent leaks within the intake distribution system.
The throttle body regulates the amount of air entering the
engine based on accelerator input. It works in conjunction with the engine
control unit to:
- Maintain smooth idle
- Deliver responsive acceleration
- Support correct air-fuel mixture
- Optimise fuel efficiency
- Maintain engine performance
The throttle body seal and mounting bolts ensure the assembly is secured correctly and remains leak-free.
Why Inlet Manifold Components Fail
Over time, intake system components are exposed to:
- High engine temperatures
- Oil vapour and carbon deposits
- Repeated heat cycling
- Vibration and mechanical stress
- Age-related rubber hardening
Common failure causes include:
- Cracked or flattened inlet manifold gaskets
- Hardened distributor tube rubber seals
- Carbon build-up in the throttle body
- Throttle actuator wear
- Reused mounting bolts losing proper clamping force
When intake seals fail, unmetered air can enter the engine,
leading to:
- Rough idle
- Hesitation during acceleration
- Lean mixture fault codes
- Check engine light activation
- Reduced fuel efficiency
- Whistling or hissing intake noises
Why You May Need This Complete Inlet Manifold Kit
If your Porsche 997.2 is experiencing intake air leaks, throttle response issues or fault codes related to mixture control, replacing all sealing components and the throttle body together ensures a thorough and reliable repair.
This kit is ideal for:
- Diagnosing intake manifold air leaks
- Fixing rough idle on Porsche 997.2
- Replacing a faulty electronic throttle body
- Preventative maintenance during intake removal
- Engine rebuild or carbon cleaning service
- High mileage maintenance refresh
Replacing all gaskets, seals and mounting hardware at the same time reduces repeat labour and ensures proper clamping force and long-term sealing integrity.
At Design911, we supply high-quality intake manifold and throttle components engineered to meet OEM specifications. This complete inlet manifold kit is designed to restore engine efficiency, improve drivability and maintain Porsche performance standards.
Using a comprehensive kit ensures correct sealing, stable idle and optimal airflow under all driving conditions.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111021501
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
6 required, sold each.
Fits:
Porsche 987.2 Boxster S 3.4L 2009-12
Porsche 987C.2 Cayman S 3.4L 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 997.2 Carrera 3.6L / 3.8L 2009-12 incl. cars with X51 Powerkit 250kW
Porsche 997.2 Turbo 3.8L 2010-13
Porsche 991.1 Carrera 2012-16 incl. cars with X51 Powerkit 250kW
Porsche 991 Turbo 2014-20
Porsche 991 GT3 3.8L / 4.0L 2014-21
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111021501
The product you are viewing cross references to these numbers
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
6 required, sold each.
Fits:
Porsche 987.2 Boxster S 3.4L 2009-12
Porsche 987C.2 Cayman S 3.4L 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 997.2 Carrera 3.6L / 3.8L 2009-12 incl. cars with X51 Powerkit 250kW
Porsche 997.2 Turbo 3.8L 2010-13
Porsche 991.1 Carrera 2012-16 incl. cars with X51 Powerkit 250kW
Porsche 991 Turbo 2014-20
Porsche 991 GT3 3.8L / 4.0L 2014-21
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111021501
The product you are viewing cross references to these numbers
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16

Fits:
Cars with PowerKit 250kW
Porsche 997.2 Carrera 3.8L (X51) 2008-12
Porsche 991.1 Carrera GTS models 2013-16
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111044040
The product you are viewing cross references to these numbers
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16

Fits:
Cars with PowerKit 250kW
Porsche 997.2 Carrera 3.8L (X51) 2008-12
Porsche 991.1 Carrera GTS models 2013-16
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A111044040
The product you are viewing cross references to these numbers
Air Inlet Engine Gaskets – Precision Sealing for Optimal Porsche Performance
Air inlet engine gaskets are crucial sealing components within your Porsche’s intake system. They ensure an airtight connection between the intake manifold, throttle body, and other air passages, preventing unmetered air from entering the engine. By maintaining proper air pressure and flow, these gaskets help your Porsche deliver smooth performance, efficient combustion, and consistent power output.
At Design911, we supply a complete selection of genuine and high-quality air inlet gaskets for various Porsche models, including 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each gasket is designed for precise fitment, high heat resistance, and superior durability — ensuring reliable performance and long-lasting sealing under all driving conditions.
What Do Air Inlet Engine Gaskets Do?
Air inlet gaskets serve as a critical barrier that ensures
only properly metered air enters your Porsche’s engine. Their functions
include:
- Sealing
joints between intake components to prevent air leaks.
- Maintaining
correct air-fuel ratios for efficient combustion.
- Preventing
contamination from oil, dust, and debris.
- Ensuring stable engine idle and performance by regulating airflow integrity.
A high-quality gasket keeps your Porsche’s intake system perfectly balanced, contributing to smooth throttle response, better fuel efficiency, and reliable power delivery.
Why Do Air Inlet Engine Gaskets Fail?
Exposure to extreme heat, pressure, and vibration gradually
wears down air inlet gaskets. Over time, they can lose elasticity and sealing
capability. Common causes of failure include:
- Thermal
expansion and contraction causing cracks or deformation.
- Material
fatigue from continuous heat cycling.
- Oil
or coolant contamination degrading gasket integrity.
- Improper
installation or over-torquing during servicing.
- Age-related wear and drying of gasket material.
Symptoms of a failing air inlet gasket include rough idle, vacuum leaks, hissing noises, poor fuel economy, or a check engine light related to air-fuel imbalance.
Why Replace a Faulty Air Inlet Engine Gasket?
A worn or leaking air inlet gasket can allow unmetered air into the engine, disrupting combustion and reducing performance. Replacing it restores proper air sealing, improving efficiency and reliability while preventing potential damage to intake components.
Benefits of replacement include:
- Restored airtight sealing for optimal engine performance.
- Smoother idle and improved throttle response.
- Enhanced fuel efficiency and reduced emissions.
- Long-term reliability with manufacturer-quality materials.
All gaskets from Design911 are made from premium-grade composites or multi-layer materials, designed to withstand heat, pressure, and chemical exposure — ensuring consistent sealing and performance for every Porsche model.