Turbo Chargers / Intercoolers & Parts

Breather Line For Turbocharger, Cylinders 4-6.

The breather line for the turbocharger (cylinders 4–6) is a key component of the engine crankcase ventilation and turbo system, designed to route blow-by gases and oil vapours safely away from the engine and turbocharger assembly. This line ensures proper pressure regulation and helps prevent oil contamination within the intake and turbo system.

Fits:

• Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
• Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
• Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19

  
Diagram Ref No 16

What This Product Does:

• Channels blow-by gases from cylinders 4–6 to the intake/turbo system
• Regulates crankcase pressure in turbocharged engines
• Prevents oil vapour buildup and contamination
• Supports efficient combustion and emissions control

Symptoms Of Wear Or Failure:

• Cracked, brittle, or damaged hose
• Oil leaks or residue around the turbo area
• Whistling noises caused by vacuum leaks
• Rough idle or engine performance issues
• Increased oil consumption
• Check engine light related to ventilation faults

Why Replacement Matters:

• Ensures proper crankcase ventilation and pressure balance
• Prevents oil leaks and vacuum leaks
• Maintains optimal turbocharger performance
• Reduces oil contamination in the intake system
• Helps avoid costly engine and turbo damage

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9A110724274

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CSF High-performance intercoolers.

For a long time the only solution for a Porsche 991 GT2 RS intercooler upgrade was not an upgrade, but a band-aid for the stock 1990's style water spray system which sprays water from a reservoir in the frunk and onto the intercoolers. The band-aid was to install a larger capacity water tank which simply delayed the inevitable running out of water and output to be automatically limited by the factory ECU to try to keep the engine safe. Until you refilled the reservoir again it's likely your 991 GT2 RS would struggle with charge temps and limited output.

Experts in cooling CSF and PWR have joined operations to deliver a High-Performance Intercooler Upgrade for the 991 GT2 RS which eliminates heat soak and lowers charge air temps on stock, tuned and tracked cars. CSF achieves this by using an F1 performance grade core which dramatically improves the efficiency of the intercoolers within the same space constraints.

The CSF High-Performance Intercoolers for the GT2 RS boasts 13 more cooling rows than the stock intercooler, boasting 28 rows in total vs. the stock 15. The tube height and fin height is also maximised with the CSF core boasting a dual-row 3mm rolled tube vs. the factory 7mm height and the CSF core uses a fin height of 4.85mm vs. the factory 7mm. As you can see, the CSF core maximises performance in every area.

The differences don't just end in performance. The CSF High-Performance Intercoolers for the GT2 RS also boast reliability and durability improvements. Customer feedback has reported numerous failures with the standard end-tanks which uses an un-secure and failure-prone crimped and gasketed mechanism which can leak over time with numerous boost cycles and increased boost pressure with tuned cars, whereas the CSF High-Performance Intercoolers for the GT2 RS is 100% TIG welded for maximum reliability and durability.

Stock Porsche Intercooler Specification :
• Numbers of Tubes = 15
• Tube Height = 7mm
• Fin Height = 7mm
• Weight = 8.146KG
• Cast End Tanks, Crimped with Gaskets

Cross reference numbers
99111064073, 99111063973

CSF High Performance GT2 RS Intercooler Specification:
• Numbers of Tubes = 28
• Tube Height = 3mm Rolled Tube
• Fin Height = 4.85mm
• Weight = 8.146KG
• Billet End Tanks with TIG Welding

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8166

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Grommet For Charge Air Cooler.
Sold Each.
x6 Required Per Car.

Fits:
Porsche 991 Turbo / Turbo S 3.8L MKI 2014>>2016
Cars With Engine Codes:
A171

Porsche 991 Turbo / Turbo S 3.8L MKII 2016>>2020
Cars With Engine Codes:
DABA / DAB / DBCA / DBC / DBCB

Porsche 991 GT2 RS 3.8L MKII 2017>>2020
Cars With Engine Codes:
DHNA

Diagram Ref No 34

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99150484900

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Intercooler to Turbocharger Pressure Hose 

These intercooler to turbocharger pressure hoses are designed for Porsche 991.2 GT2 RS models and are specific to cylinders 1–3 (bank 1) and 4-6 (bank 2). They form a critical part of the turbocharged charge air system, ensuring compressed air is transferred efficiently between the turbocharger and intercooler.

Fits:

• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19       

Diagram ref no 7 and 8

In high-performance twin-turbo Porsche engines, each bank operates under extreme pressure and temperature. This hose plays a vital role in maintaining boost pressure and ensuring consistent airflow to the engine.

What This Pressure Hose Does

This hose connects the turbocharger to the intercoolers allowing compressed air to be cooled before entering the engine.

It helps:

• Maintain stable boost pressure
• Ensure efficient airflow between turbocharger and intercooler
• Deliver cooled air for optimal combustion
• Support balanced engine performance across both cylinder banks
• Maintain airtight integrity of the charge air system

A failure in this hose can directly affect performance on one side of the engine.

Why Intercooler/Turbo Pressure Hoses Fail

Due to the extreme operating conditions of turbocharged engines, these hoses are subject to wear over time.

Common causes include:

Heat and pressure cycling
Constant exposure to high temperatures and boost pressure weakens materials.

Cracking or splitting
Rubber or reinforced sections can degrade, especially near connectors.

Boost pressure stress
Higher boost levels increase strain on hoses.

Seal and clamp deterioration
Connections can loosen or wear, causing air leaks.

Symptoms of a Failing Pressure Hose 

• Loss of boost pressure
• Reduced engine performance or uneven power delivery
• Hissing or air leak noise under acceleration
• Engine warning lights related to boost or airflow imbalance
• Poor throttle response
• Increased fuel consumption

Replacing a faulty hose restores balanced airflow and engine performance.

Why You May Need to Replace This Hose

Restore Balanced Boost Pressure
Ensures consistent performance across both cylinder banks.

Eliminate Boost Leaks
Prevents pressure loss within the turbo system.

Improve Engine Efficiency
Maintains optimal airflow and combustion.

Prevent Further Turbo System Damage
Leaks can cause increased strain on turbochargers and related components.

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99111063

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O-ring for turbocharger oil supply line. 

Sold individually; x4 required per vehicle.

Fits:
Porsche 95B-1 Macan S / GTS / Turbo 2014-18 - Excludes diesel and 2.0 base model

Porsche 997.2 Turbo 2010-13 - Excludes GT2 RS

Porsche 991 Turbo / GT2 RS 2014-20

Porsche 958.2 Cayenne S / GTS 3.6L V6 2015-18

Porsche 970.2 Panamera S / 4S 3.0L V6 2014-18

Diagram ref. 2.

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99970761341

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Intercooler to Cut-Off Valve Pressure Hoses

These intercooler to cut-off valve pressure hoses are designed for the Porsche 991.2 GT2 RS and form an essential part of the charge air system. They connect the intercooler to the cut-off (diverter) valve, ensuring controlled airflow and pressure regulation within the turbo system.

Fits:

• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19       

Diagram ref no 5 and 6

In a high-performance twin-turbo engine, managing boost pressure is critical. These hoses allow pressurised air to be routed correctly between components, supporting both performance and system protection.

What These Pressure Hoses Do

These hoses link the intercooler to the cut-off valve, which regulates excess boost pressure when the throttle closes.

They help:

• Maintain stable and controlled boost pressure
• Allow excess pressure to be safely redirected via the cut-off valve
• Ensure smooth throttle transitions and turbo response
• Support efficient airflow within the charge air system
• Protect turbochargers from pressure surges

A properly functioning hose ensures the turbo system operates smoothly and efficiently.

Why Intercooler to Cut-Off Valve Hoses Fail

Due to their position within the turbo system, these hoses are exposed to high pressure, heat and constant airflow.

Common causes include:

Heat and pressure cycling
Repeated expansion and contraction weakens hose material.

Cracking or splitting
Rubber or reinforced sections can degrade over time.

Boost pressure stress
High boost levels place additional strain on hose walls.

Seal and connection wear
Clamps and joints may deteriorate, leading to leaks.

Symptoms of Failing Pressure Hoses

• Boost leaks or inconsistent turbo pressure
• Hissing noise during acceleration or gear changes
• Reduced engine performance
• Poor throttle response
• Engine warning lights related to boost control
• Increased turbo lag

Replacing worn hoses restores proper boost regulation and system efficiency.

Why You May Need to Replace These Hoses

Restore Boost Control
Ensures the cut-off valve operates correctly under all conditions.

Eliminate Boost Leaks
Prevents pressure loss within the charge air system.

Improve Throttle Response
Supports smooth transitions during acceleration and gear changes.

Protect Turbo Components
Prevents pressure spikes that can damage turbochargers.

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99111023

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Pressure Line For Turbocharger. 

The turbocharger pressure line is a critical component of the forced induction and engine lubrication system, designed to deliver pressurised oil or air (depending on application) to the turbocharger. This line ensures the turbo operates efficiently by maintaining proper pressure supply for lubrication and performance.

Fits:

• Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
• Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
• Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19  

Diagram Ref No 12

What This Product Does:

• Supplies pressurised fluid (oil or air) to the turbocharger
• Ensures proper lubrication and/or pressure for turbo operation
• Supports efficient turbo performance and boost response
• Maintains system integrity under high pressure conditions

Symptoms Of Wear Or Failure:

• Oil or air leaks around the turbocharger area
• Loss of turbo performance or reduced boost pressure
• Visible cracks, corrosion, or damage to the line
• Whistling or hissing noises from leaks
• Engine warning lights related to turbo or boost pressure

Why Replacement Matters:

• Ensures proper pressure and lubrication supply to the turbo
• Prevents leaks and pressure loss within the system
• Maintains optimal turbo performance and boost efficiency
• Protects the turbocharger from overheating and premature wear
• Helps avoid costly repairs to turbo and engine components

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Rubber grommet for intercooler system. 

Sold individually; x2 required per vehicle. 

Fits:
Porsche 991 Turbo / GT2 RS 2014-20

Diagram ref. 15.

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99970204350

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TTE1200 VTG upgrade turbocharger for Porsche 991.2 GT2 RS

Welcome to our TTE1200VTG Upgrade turbocharger stage for Porsche 911 GT2 RS 3.8L 700PS flat-6. To construct a pair of TTE1200 VTG we change the original compressor and employ a far larger and more efficient billet wheel and mill the compressor cover to optimum gap to match the new compressor profile.

Equilibrium:

Precisely balancing our turbochargers is a key critical factor to become a TTE upgrade unit as longevity and performance are paramount. Good balance improves acoustics also. Subsequent great care is taken with all TTE turbochargers to achieving our balance standards. Firstly parts are balanced at slow speeds up to 2800RPM in multiple planes using our single parts machine, then components are assembled and then the CHRA are dynamically balanced, but this time depending on application at up to 250,000 RPM in multiple planes using our in house VSR machine to acquire the ultimate equilibrium, to a standard far higher than OEM. Each turbocharger is supplied with serial numbered balance test result document.

TTE1200 VTG can be fitted to Any 3.8 but you would need GT2 RS Exhaust Manifolds as turbo flange different, also oil, water lines, charge pipes and intakes

• Original BWTS turbocharger as the base part
• TTE Billet Milled compressor 7+7 BLADE
• TTE High-Flow 9 blade Turbine
• 1200 PS Capable
• Plug and Play installation for GT2RS (larger turbo intakes needed)
• Proven TheTurboEngineers quality
• Single parts finely balanced then components assembled and core high-speed VSR balanced
• Supplied with a balance test result document
• Made in Germany

Turbocharger, Cylinders 1-3.



Fits:
Porsche 991 GT2 RS 3.8L (Engine: 9A1) 2017/10/01>>

Click 'Zoom in' for large parts diagram.
Diagram ref no 1 (Left, cyl 1-3).

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9A112301581

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Standard replacement turbocharger.
Units listed are direct replacement for the standard Turbo chargers.


BorgWarner ref no 18559980046 / 18559980047

Fits:

REPLACEMENT
These turbos are a direct installation in replacement of your factory turbos.

Click 'Zoom in' for large parts diagram.
Diagram ref no 1 (Left, cyl 1-3) or 2 (Right, cyl 4-6)

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9A112301

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Water tank charge air cooler. 

Fits:
Porsche 991.2 GT2 RS

Water tank

An additional water tank for charge air cooling increases the standard volume by around 9 litres and ensures that the range is significantly extended between water refills. 

As a result, this allows the intake air temperature to be cooled for longer, with the objective of achieving maximum power yield.

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