Inter Coolers
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
8166
The product you are viewing cross references to these numbers
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19

BBi worked with C&R racing to develop and validate intercoolers for the GT2 RS system. The new system is enhanced in every way to maximize cooling performance. This system went through extensive validation in 1/2 mile and road course enviroments as well as hot weather condition testing. This is the same intercooler system as installed on the BBi VMax GT2 RS that went 226.95mph, becoming the fastest GT2 RS 991 in the world.
• Number of Tubes: 28 (OE: 15)
• Tube Height: 3mm (OE: 7mm)
• Fin Height: 4.85mm (OE: 7mm)
• Weight: 18lbs (same as OE)
• Design: CNC Endtanks, welded (OE: cast endtanks, crimped on)
As part of PWR Advanced Cooling Technology, C&R is a full-scale cooling provider, supplying R&D, testing and production of cooling solutions to top-tier race teams, performance automotive niche vehicle manufacturers, and specialty car builders who want only the best for their projects. This kit is ready for installation (plug & play) and features a tube and fin core for ultimate cooling. We opted for a tube and fin core instead of bar and plate for its lighter weight and more efficient thermal inertia. This means it cools quickly when exposed to direct air flow.
Features:
• CNC Machined Billet End Tanks, Inlet/Outlet Ports
• Tube & Fin 2-row core, designed by PWR
• Designed to Use OEM Plumbing and Shrouds
• Compatible with Porsche 991.2 GT2 RS
Made in USA
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BBI9911070002
The product you are viewing cross references to these numbers
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19

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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99104480639
The product you are viewing cross references to these numbers
Porsche Inter Coolers
At Design911, we supply a wide range of inter coolers for Porsche models, helping you maintain, personalise and enjoy your car.
Why do Porsche Inter Coolers matter?
Inter Coolers affect how efficiently the engine in your Porsche runs, especially on turbocharged models. Over time they can suffer from leaks, corrosion and reduced efficiency, or simply no longer be suitable once you start tuning the engine. Replacing tired or undersized intercoolers helps your Porsche stay reliable, consistent and enjoyable to drive, particularly under heavy load.
- Keep your Porsche looking smart rather than tired or neglected
- Help protect the surrounding area from dirt and corrosion where relevant
- Reduce minor niggles such as looseness, rattles or mismatched parts
- Support long-term enjoyment, pride of ownership and potential resale value
Common options & kits
Individual replacement parts
Specific items to address a particular area or issue without changing everything at once.
- Ideal for targeted repairs
- Lets you replace only what is needed
- Helps keep initial costs under control
Matched sets or pairs
Components supplied together so both sides or related items are renewed at the same time.
- Consistent feel and performance
- Helps avoid uneven wear or behaviour
- A sensible choice for routine maintenance
Complete kits
Grouped parts designed to refresh a whole system or area in one go, useful for upgrades and restorations.
- Everything specified in a single package
- Saves time compared with sourcing parts individually
- Ideal when upgrading or restoring your Porsche
Brands & quality options
At Design911, we stock genuine Porsche parts where available, plus OEM-equivalent and carefully selected aftermarket brands. This lets you choose between keeping things original, adding subtle upgrades, or managing budgets on everyday maintenance.
Agency Power
Agency Power produces a range of functional racing and performance products, including parts for Porsche models. Components are developed through track use and product testing to help ensure fitment and consistency.
Alpha
Alpha Performance, part of AMS, engineers intercooler systems and related components with a focus on efficient cooling and durability. Their Porsche products are developed using computer-aided design and motorsport experience to optimise fitment and airflow.
BBi Autosport
BBi Autosport is a Porsche-focused motorsport and tuning company with decades of combined racing experience. Their performance parts are developed from track programmes and professional racing, with attention to fit, function and workshop use.
CSF
CSF designs and manufactures high‑performance Porsche cooling products for motorsport and enthusiast use. Their intercoolers and radiators focus on efficient heat rejection, robust construction and reliable fitment.
Denso
Always check the exact part number and fitment data when choosing Denso components to ensure the correct match for your specific Porsche model and engine.
When should you review or replace your Porsche inter coolers?
Checking inter coolers regularly helps you spot wear, damage or age-related deterioration before it affects comfort, refinement or leads to more expensive repairs later on.
- Existing parts are worn, cracked, scuffed, faded, corroded or missing
- You notice looseness, vibration or an untidy appearance around the area they sit in
- You have had related work carried out and want everything to look and feel consistent
- You want the car to feel smarter and better cared for in daily use or before resale
If any of these apply, it is a good time to review your inter coolers and replace anything that is past its best, so your Porsche stays dependable and enjoyable to drive.
Explore Porsche inter coolers with Design911
Browse inter coolers for Porsche at Design911 — from individual parts to complete kits — and find options to suit everyday maintenance, upgrades and full projects.