Oil Coolers / Radiators / Heat Exchangers
 Heat exchanger mount plate. Porsche 986 Boxster
                        
                    
            
            
                    Heat exchanger mount plate. Porsche 986 Boxster
                     
            
            
                    - Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
 
 Fits:
Porsche 986 Boxster 1997-05
Click 'Zoom in' for large parts diagram.
Diagram ref no 35
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610712900
The product you are viewing cross references to these numbers
 Shop Securely
                                Shop Securely
                            
                             12 Month Warranty
                                12 Month Warranty
                            
                             Worldwide Delivery
                                Worldwide Delivery
                            
                     Radiator oil cooler on engine. Porsche 986 / 987 Boxster
                        
                    
            
            
                    Radiator oil cooler on engine. Porsche 986 / 987 Boxster
                     
            
            
                    - Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
Genuine
 
 Fits:
Porsche 986 Boxster 2.5L / 2.7L 1994-04
Porsche 987 Boxster 2.7L / 3.2L 2005-08
Click 'Zoom in' for large parts diagram.
Diagram Ref No 18.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610702509
The product you are viewing cross references to these numbers
 Shop Securely
                                Shop Securely
                            
                             12 Month Warranty
                                12 Month Warranty
                            
                             Worldwide Delivery
                                Worldwide Delivery
                            
                     Radiator oil cooler on engine. Porsche 986 / 987 Boxster
                        
                    
            
            
                    Radiator oil cooler on engine. Porsche 986 / 987 Boxster
                     
            
            
                    - Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08

Fits:
Porsche 986 Boxster 2.5L / 2.7L 1994-04
Porsche 987 Boxster 2.7L / 3.2L 2005-08
Porsche Cayman S 3.4L 987C 2005-08
Click 'Zoom in' for large parts diagram.
Diagram Ref No 18.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610702509
The product you are viewing cross references to these numbers
 Shop Securely
                                Shop Securely
                            
                             12 Month Warranty
                                12 Month Warranty
                            
                             Worldwide Delivery
                                Worldwide Delivery
                            
                     Radiator oil cooler on engine. Porsche 986 / 987 Boxster
                        
                    
            
            
                    Radiator oil cooler on engine. Porsche 986 / 987 Boxster
                     
            
            
                    - Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
This engine oil cooler is a direct replacement for the original Porsche unit. It functions as a water-to-oil heat exchanger, efficiently transferring heat from the engine oil to the coolant to maintain optimal operating temperature. Built to OEM specifications, it ensures reliable cooling, consistent oil viscosity, and long-term engine protection under demanding conditions.
Fits:
Porsche 986 Boxster 2.5L / 2.7L 1994 - 2004
Porsche 987 Boxster 2.7L / 3.2L 2005 - 2008
Porsche 987C Cayman S 3.4L 2005 - 2008
Diagram Ref No 18.
Benefits:
• Maintains optimal oil temperature to reduce wear, prevent oil breakdown and engine damage
• Direct-fit replacement ensures correct mounting, connections and flow rate
• Engineered for long life and reliability even in high-stress driving environments
Over time, engine oil coolers are exposed to high thermal cycles, pressure, and contaminants that can cause internal clogging, corrosion, or coolant-to-oil leaks. A failing cooler can lead to elevated oil temperatures, reduced lubrication, and even engine damage due to oil breakdown or cross-contamination.
When to replace:
• When oil temperature readings are abnormally high or fluctuating.
• If you notice oil in the coolant or coolant in the oil (a sign of internal leakage).
• During engine rebuilds or cooling system overhauls to ensure proper performance.
• As preventive maintenance on older engines or vehicles used in track or high-load conditions.
Replacing the oil cooler restores efficient heat transfer, maintains stable operating temperatures, and ensures long-term engine reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610702509
The product you are viewing cross references to these numbers
 Shop Securely
                                Shop Securely
                            
                             12 Month Warranty
                                12 Month Warranty
                            
                             Worldwide Delivery
                                Worldwide Delivery
                            
                    Engine Oil Coolers, Radiators & Heat Exchangers – Precision Cooling for Porsche Performance
The engine oil cooler and heat exchanger system plays a critical role in managing temperature within your Porsche’s engine. By transferring excess heat away from the oil and other fluids, these components ensure stable operating temperatures, consistent lubrication, and maximum engine longevity — especially under demanding performance conditions.
At Design911, we offer a full range of engine oil coolers, radiators, and heat exchangers for Porsche models old and new. Built from high-efficiency aluminium or reinforced composite materials, these components are designed to deliver superior cooling performance, durability, and perfect fitment — ensuring your Porsche performs at its best, on road or track.
Whether replacing a worn-out unit or upgrading for improved thermal efficiency, our oil cooling components provide reliable temperature control and enhanced performance.
What Do Engine Oil Coolers, Radiators & Heat Exchangers Do?
These components regulate oil and engine temperatures to maintain optimal performance and prevent overheating.
Core Functions:
- Dissipate
     excess heat from the engine oil, coolant, or transmission fluid.
 
- Maintain
     consistent oil viscosity and prevent breakdown under load.
 
- Protect
     internal engine components from heat-related wear and failure.
 
- Improve overall performance efficiency during extended drives or track sessions.
Together, the oil cooler, radiator, and heat exchanger form an essential thermal management system, helping your Porsche run at peak performance while protecting vital components.
Why Do Oil Coolers & Heat Exchangers Fail?
Over time, exposure to heat cycles, vibration, and contaminants can lead to efficiency loss or complete failure.
Common Causes of Failure Include:
- Corrosion
     or cracking from age or road debris impact.
 
- Internal
     clogging caused by sludge or contaminated oil.
 
- Leaking
     seals or fittings, reducing pressure and fluid efficiency.
 
- Thermal
     fatigue, leading to reduced cooling capacity.
 
- Poor maintenance or coolant neglect, accelerating deterioration.
Symptoms of failure can include high oil temperatures, oil leaks, coolant contamination, or reduced engine performance, all of which signal the need for inspection or replacement.
Why Replace Oil Cooling Components?
Replacing a worn or leaking oil cooler, radiator, or heat exchanger is essential to preserve lubrication quality and prevent costly overheating damage. Our precision-fit, high-durability components restore proper cooling balance and reliability under all conditions.
Key Benefits:
- Restores efficient oil and fluid temperature regulation.
- Prevents overheating and engine wear.
- Improves reliability under heavy load or track use.
- Constructed from corrosion-resistant, high-performance materials.
- Direct-fit compatibility for classic and modern Porsche engines.
- Ideal for rebuilds, maintenance, and performance upgrades.
Upgrading or replacing your cooling system components helps ensure your Porsche’s engine stays efficient, durable, and ready for spirited driving.
Highlights:
- Comprehensive range of Porsche oil coolers, radiators, and heat exchangers.
- Precision-engineered for consistent temperature control.
- Constructed from lightweight, corrosion-resistant materials.
- Designed for reliability in both road and motorsport conditions.
- Improves lubrication and protects engine performance.
- Perfect for maintenance, rebuilds, or performance enhancements.
 
 
         
                
                
                    
 
                                     
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                