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Porsche > Boxster 718 (982) 2017>> > Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>> > Engine Tuning >

Radiators

Radiators

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DISPLAYING 1 to 3 (of 3 products)
Aluminium Centre Radiator for Coolant Water & Hoses Porsche 991 GT2RS, 718 GT4, 718 SPYDER - 99110613802, 99110613801, 99110603890
4
Aluminium Centre Radiator for Coolant Water & Hoses Porsche 991 GT2RS, 718 GT4, 718 SPYDER
7068KIT.1
Product Information
Product Information

Racing and high performance radiators for all Porsche models make a great performance upgrade as well as an incredibly durable and reliable OE replacement. This kit includes hoses & fittings 

Fits:
Porsche Boxster Spyder / Sypder RS 718 4.0L 01/2019>>
Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Porsche Cayman GT4 Clubsport
Porsche Cayman GT4 RS Clubsport 2020-2024


Cross reference numbers
99110613801, 99110613802, 99110603890


CSF strives to build and engineer the most advanced, efficient, and reliable cooling systems in the world. All-aluminium 100% TIG welded, CNC machined brackets, mounting pins and "Quick-Connect" inlet/outlet pipes, Drop-in fit requiring no modifications , 2 row core with B-Tube technology (+20%), 1 hour hand polished, Track Tested & Proven in 110°F, ISO 9001 certified cooling system manufacture.

ENGINEERING
"B-Tube" Technology - Most efficient tube in the world
High Efficiency Louvered Fin
OE radial and deep drawn aluminium end tanks
Wind tunnel tested for optimal radiator core cooling performance
Stronger joint design for mountings, fan shrouds & condensers
OE Specific Mounting
"Drop-in" fitment requiring no modifications
CNC Machined brackets and fittings
Racing Style all-aluminium drain plug

MANUFACTURING
Brazed in CAB Furnace
ISO 9001/9002 certification
Privately owned factories with full "In house" tool rooms
"Master Class" TIG welding

TESTING
Individually leak tested
Vibration cycle tested
Thermal cycle tested
Burst pressure cycle tested 10,000 times for strength
Salt spray tested for corrosion protection

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Related, superseded, cross reference or alternative numbers for comparison.

7068KIT.1
99110613802
99110613801
99110603890

The product you are viewing cross references to these numbers
Aluminium radiator for water coolant fluid & hoses SET OF 2. Porsche 718 Boxster / 718 Cayman - 9P1121251, 9P1121252 - 7086, 7087
3
Aluminium radiator for water coolant fluid & hoses SET OF 2. Porsche 718 Boxster / 718 Cayman
7086KIT.1
Product Information
Product Information

CSF Complete Performance Radiator Kit – Left and Right

This complete high-performance cooling kit from CSF provides a full radiator replacement solution for Porsche 718 Boxster and Cayman models. Designed as a direct OE replacement with motorsport-grade durability, the kit includes all three radiators along with essential installation components.

Fits:

  • Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
  • Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
  • Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
  • Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
  • Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
  • Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
  • Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
  • Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
  • Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
  • Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
  • Porsche Boxster Spyder / Sypder RS 718 4.0L 01/2019>>
  • Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
  • Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
  • Porsche Cayman 718 2.0L Manual (300 Bhp)
  • Porsche Cayman 718 2.0L PDK (300 Bhp)
  • Porsche Cayman S 718 2.5L Manual (350 Bhp)
  • Porsche Cayman S 718 2.5L PDK (350 Bhp)
  • Porsche Cayman T 718 2.0L Manual (300 Bhp)
  • Porsche Cayman T 718 2.0L PDK (300 Bhp)
  • Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
  • Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
  • Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
  • Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
  • Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
  • Porsche Cayman GT4 Clubsport
  • Porsche Cayman GT4 RS Clubsport 2020-2024

This makes it an ideal upgrade for ageing cooling systems or for drivers who want improved cooling performance and long-term reliability.

Kit Contents

• Left radiator
• Right radiator
• Radiator hoses
• Hose clips
• Radiator mounting buffers
• Blanking caps

This comprehensive kit allows you to replace the entire radiator system in one installation, ensuring optimal cooling performance and reducing the risk of future leaks or component failures.

Cross Reference Numbers

• LEFT:  9P1121251
• RIGHT:  9P1121252

What These Radiators Kit Do

The Porsche 718 cooling system relies on three front-mounted radiators to dissipate heat from the engine coolant. These radiators maintain stable engine operating temperatures by transferring heat away from the coolant through airflow across the radiator core.

A properly functioning radiator system helps:

• Prevent engine overheating
• Maintain optimal engine performance
• Protect cylinder heads and gaskets
• Improve cooling during heavy traffic or hot weather
• Support track and performance driving conditions

Why Porsche Radiators Fail

Over time, original radiators can suffer from:

  • Road debris damage
  • Corrosion and coolant contamination
  • Plastic end tank fatigue
  • Blocked cooling cores

Replacing all three radiators together ensures balanced cooling performance and prevents repeated labour costs.

Why Upgrade to CSF Performance Radiators?

All-Aluminium Motorsport Construction
CSF radiators are engineered using full aluminium construction with precision welding and reinforced joints, improving strength and durability compared with standard replacements.

High Efficiency Core Design
 The advanced 2-row core with CSF B-Tube technology increases cooling capacity by approximately 20 percent compared with conventional radiator tube designs.

True Drop-In Installation
 Designed as OE-specific replacements with correct mounting points and quick-connect inlet and outlet pipes for easy installation without modification.

Track-Tested Reliability
 These radiators have been tested under extreme conditions, including high ambient temperatures and track environments.

Engineering Highlights

• B-Tube technology for maximum heat transfer efficiency
• High efficiency louvered fin design
• OE radial and deep drawn aluminium end tanks
• Wind tunnel tested core for optimal airflow cooling
• Reinforced mounting design for fan shrouds and condensers
• CNC machined brackets and fittings
• Racing style all aluminium drain plug
• Direct OE fitment requiring no modifications

Manufacturing Quality

• Brazed in CAB furnace for strength and consistency
• ISO 9001 / ISO 9002 certified production
• Dedicated in-house tooling and engineering facilities
• Master-class TIG welding for precision joints

Testing and Quality Control

• Individual leak testing
• Vibration cycle testing
• Thermal cycle testing
• Burst pressure testing repeated 10,000 times
• Salt spray corrosion resistance testing



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

7086KIT.1
9P1121251
9P1121252

The product you are viewing cross references to these numbers
Aluminium Radiator for Water Coolant Fluid. Porsche 991.2 Carrera /718 Cayman & Boxster - 7086, 7087, 9P1121252, 9P1121251
5
Aluminium Radiator for Water Coolant Fluid. Porsche 991.2 Carrera /718 Cayman & Boxster
708
Product Information
Product Information

Racing and high performance radiators for all Porsche models make a great performance upgrade as well as an incredibly durable and reliable OE replacement.

Fits:
Porsche 991.2 Carrera
Porsche 991 GT2/RS
Porsche 991.2 GT3/RS/R
Porsche 718 Boxster
Porsche 718 Cayman
Porsche 718 GT4

 • OEM #:  Left: 9P1121251 / Right: 9P1121252

CSF strives to build and engineer the most advanced, efficient, and reliable cooling systems in the world. All-aluminium 100% TIG welded, CNC machined brackets, mounting pins and "Quick-Connect" inlet/outlet pipes,

• 2-Row 42mm High-Performance Core Featuring CSF's B-Tube Technology
• Core Features Ultra Efficient 6.5mm Tall Fins with a Multi-Louvered Design for Maximum Surface Area Contact
• 100% All-Aluminum TIG-Welded Construction
• CNC Machined Mounting Brackets and OEM Style "Quick Connect" Inlet/Outlet
• Sealing Foam for Optimized Airflow Into the Core and Precise Fitment Into OEM Radiator Pods
• True "Drop-in Fit" Requires No Modifications to Install
• Individually Leak and Pressure Tested
• High-Performance Upgrade Suitable for Professional Racing, Street Performance, or OEM Replacement
• 1 Hour "Mirror Finish" Hand Polish
• 2 Year Limited Warranty


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

708
7086
7087
9P1121252
9P1121251

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
Also found on these pages
About Radiators

Porsche Performance Radiators - Engine Cooling & Thermal Control Upgrades

Radiators are a critical part of the engine cooling system, responsible for dissipating heat and maintaining optimal operating temperatures. In performance-driven, tuned, or high-mileage Porsche engines, upgraded radiators play a vital role in preventing overheating, reducing thermal stress, and protecting engine components under sustained load.

Available from Design911, Porsche performance radiators are engineered to deliver increased cooling efficiency, improved airflow, and enhanced durability—making them essential upgrades for road, track, and high-performance applications.

What Do Radiators Do?

Radiators regulate engine temperature by transferring heat away from the coolant.

Core Functions:

  • Dissipate engine heat efficiently.
  • Maintain stable operating temperatures.
  • Prevent overheating under load.
  • Support consistent engine performance.
  • Protect internal engine components from heat damage.

Effective cooling is essential for engine reliability and longevity.

Why Do Radiators Fail?

Standard radiators can degrade over time due to age, contamination, and increased thermal demand. Common failure causes include:

  • Internal blockage from debris or sediment.
  • External fin corrosion or damage.
  • Coolant leaks from plastic end tanks or seals.
  • Reduced efficiency due to age and contamination. 
  • Increased heat load from tuned or track-driven engines.

A failing radiator can lead to overheating, coolant loss, and serious engine damage if left unresolved.

Why Upgrade to a Performance Radiator?

Performance radiators are designed to handle higher thermal loads more effectively.

Upgrade Benefits:

  • Increased cooling capacity and heat dissipation.
  • Improved airflow and coolant flow efficiency.
  • Stronger materials for enhanced durability.
  • Reduced risk of overheating during spirited or track driving.
  • Ideal upgrade for tuned and high-output engines.

Upgrading the radiator helps protect engine reliability while supporting performance enhancements.

Highlights

  • Porsche performance radiator upgrades
  • Improved cooling efficiency and heat management
  • Designed for tuned and high-performance engines
  • Enhanced durability and long service life
  • Essential upgrade for track and performance use       

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