CSF FE1 Civic Si / DE4 Integra High-Performance All-Aluminum Radiator

CSF has established itself as a trusted leader in the design and manufacture of advanced cooling solutions for Honda vehicles, leveraging decades of experience and a strong partnership with Honda Performance Development (HPD). This collaboration has yielded factory radiators that meet the rigorous demands of high-performance applications, including the CSF private label HPD Race Radiator used in the FK8 Civic Type R TCR. Building upon this foundation, CSF has developed a High-Performance All-Aluminum Radiator specifically engineered for the FL5 Civic Type R and the FE1 Civic Si, incorporating cutting-edge technology derived from their racing radiator expertise.

The new CSF FE1 Civic Si / DE4 Integra radiator features the latest 5mm fin cooling technology, which significantly enhances heat transfer efficiency by increasing the surface area by 20-25% compared to conventional larger fin designs. This innovation ensures superior thermal management, crucial for maintaining optimal engine temperatures during demanding driving conditions.

The original equipment (OE) radiator supplied by Honda utilizes a plastic tank with a single-row aluminum core, a configuration that offers durability and adequate performance for standard driving. However, for high horsepower builds and aggressive driving styles, this setup may not provide sufficient cooling capacity. Turbocharged engines such as the L15CA found in these vehicles generate substantial heat, and effective temperature control is essential to preserve engine longevity and component reliability.

Mirroring the design principles of the HPD Race Radiator, the CSF FE1 Civic Si / DE4 Integra radiator incorporates a 2-row, 42mm thick aluminum core that is 33% larger than the OE counterpart. This increased core volume enhances fluid capacity and heat dissipation capabilities. Additionally, CSF’s exclusive B-Tube Technology improves heat transfer efficiency by approximately 15% over standard oval welded tubes, while the multi-louvered fins optimize airflow through the core to maximize cooling performance.

Constructed from 100% TIG-welded aluminum, this radiator offers exceptional structural integrity and resistance to the stresses of high-performance driving. The robust construction not only ensures durability but also extends the service life of the radiator under demanding conditions. Designed as a direct replacement, the CSF radiator mounts seamlessly in the factory location without requiring any modifications or cutting, facilitating straightforward installation.

Features

• 2-Row, 42mm Ultra-High-Performance Core for enhanced cooling capacity
• Cooling Tubes featuring CSF's Exclusive B-Tube Technology for superior heat transfer
• Innovative 5mm Tall Ultra Efficient Fins with Multi-Louvered Design to maximize surface area contact and airflow
• CNC Machined Mounting Brackets and OEM Style Inlet/Outlet for precise fitment
• 100% All Aluminum TIG-Welded Construction ensuring strength and durability
• 1.4 Bar (20psi) High Pressure Radiator Cap branded with CSF logo for reliable pressure management
• 1-Hour "Mirror Finish" Hand Polish delivering a premium aesthetic and corrosion resistance
• True Plug-and-Play "Drop-in Fit" Installation requiring absolutely no modifications
• Individually Leak and Pressure Tested to guarantee quality and performance

Applications

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.