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Track & Race Coolant Radiators

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DISPLAYING 1 to 4 (of 4 products)
RADKIT99701
Product Information
Product Information
Aluminium Radiator Kit of 3

csf

Fits:
Porsche 987 Boxster 2005>>
Porsche 987C Cayman 2005-08
Porsche 997 2005-08

Cross reference numbers
8MK376730581, 8MK376733671, 99710613102, 99710613202,
Centre Rad 8MK376729531, 99710603702,

Racing & high performance radiators for all Porsche models. 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Related, superseded, cross reference or alternative numbers for comparison.

RADKIT99701
8MK376730581
8MK 376 730-581
8MK376733671
8MK 376 733-671
99710613102
99710613202
7047
7048
7049

The product you are viewing cross references to these numbers
Black Friday Sale
7049
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 987 Boxster S 3.2L 2005-08 (ONLY for Tiptronic cars)
Porsche 987 Boxster S 3.4L 2009>>
Porsche 987C Cayman S 3.4L 2006-08 (ONLY for Tiptronic cars)
Porsche 987C Cayman S 3.4L 2009>>
Porsche 997 Carrera 2005-08
Porsche 997 Carrera 2009>>

Cross reference numbers
8MK376729531 / 99710603702

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.

7049
99710603702
53799
8MK376729531
8MK 376 729 531
1614200203

The product you are viewing cross references to these numbers
704
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 987 Boxster 2005>>
Porsche 987C Cayman 2005-08
Porsche 997 2005-08

Cross reference numbers
8MK376730581, 8MK376733671, 99710613102, 99710613202,

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.

704
8MK376730581
8MK 376 730-581
8MK376733671
8MK 376 733-671
99710613102
99710613202
1614200173
1614200183

The product you are viewing cross references to these numbers
R-21087
Product Information
Product Information
Third radiator kit.

rennline

Fitment Guide:

Boxster.1 - 06-08 Boxster (requires cutting of center opening) (Manual Transmission Only)
Cayman.1 - 06-08 Cayman or Cayman S (Manual Transmission Only)
BoxsterS - 05-08 Boxster S (Manual Transmission Only)
Boxster.2 - 09-12 Boxster, Boxster S and Spyder (Manual Transmission Only)
Cayman.2 - 09-12 Cayman, Cayman S and Cayman R


Adding a third radiator to your watercooled Porsche is a great way to make sure it will run strong on the street and at the track even in the hotest weather and will ensure greater longetivity in years to come. A factory option for Power Package cars, this kit includes radiators, hoses and all necessary hardware to install this OEM centerpiece. This is a necessary modification for those who will be taking their car to the track in extreme heat, but even standard street cars can benefit during the summer. The location of the coolant thermostat ensures that your engine will take no longer to warm up than before, but you will have significantly increased cooling capacity when you need it.

Includes all necessary parts and hardware. Minor trimming and painting may be required, check notes below.

For the ultimate setup pair this radiator kit with our Rennline Radiator Grill Screens.
DISPLAYING 1 to 4 (of 4 products)
Also found on these pages
About Track & Race Coolant Radiators

High-Performance Track & Race Coolant Radiators for Motorsport-Level Engine Cooling

Track and race coolant radiators are engineered to withstand the extreme thermal demands of motorsport, high-revving engines and repeated full-throttle operation. Designed to offer superior cooling capacity compared to standard radiators, these units feature enhanced cores, high-flow fin structures, improved heat dissipation and reinforced construction. Whether preparing for track days, competitive racing or spirited performance driving, upgrading to a race-spec radiator is essential for maintaining safe engine temperatures under severe conditions.

These radiators provide robust cooling efficiency, helping prevent overheating, power loss and premature wear—making them a crucial component for any high-performance build.

What Track & Race Coolant Radiators Do

Performance radiators deliver significantly improved cooling by:

  • Increasing coolant flow through larger or multi-row cores
  • Maximising heat transfer with high-efficiency fin designs
  • Managing extreme temperatures produced during racing or track sessions
  • Preventing overheating when engine output and ambient heat are at their highest
  • Improving coolant stability during repeated high-load cycles
  • Supporting upgraded engines, forced induction setups or heavy performance tuning

These radiators maintain optimal operating temperatures where standard cooling components cannot cope.

Why Standard Radiators Fail Under Track Conditions

Racing conditions expose radiators to far greater stress than road use. Failures often occur due to:

  • Heat saturation where standard cooling cores cannot dissipate enough heat
  • Coolant boiling or overflow caused by extreme temperatures
  • Weak core construction leading to cracks or leaks
  • Blocked or restricted fins reducing airflow
  • Plastic end-tank fatigue failing under high thermal load
  • Vibration damage from track surfaces and aggressive driving
  • Insufficient coolant flow in performance-modified engines

Symptoms include rising coolant temperatures, steam, coolant loss, reduced power, limp-mode activation or overheating during extended high-load operation.

Why You Should Upgrade to a Track & Race Coolant Radiator

Replacing the standard radiator with a high-quality, motorsport-grade alternative engineered for superior heat management ensures consistent performance and protects the engine from severe damage.

Key benefits include:

  • Stable coolant temperatures under extreme load
  • Improved reliability during track days, racing or spirited driving
  • Enhanced heat dissipation and faster cooling recovery
  • Stronger construction with alloy tanks and reinforced cores
  • Prevention of head gasket failure, detonation and thermal stress
  • Longer life for coolant hoses, water pumps and thermostats
  • Increased confidence and capability for high-performance driving

A race-spec radiator is one of the most impactful upgrades for track-driven vehicles or modified engines.

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