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 Year Range Make Chassis Code Model Trim Engine / Trans / Etc Notes 2023-2025 Acura DE4 Integra A-Spec Turbocharged 1.5L L4 – 2023-2025 Acura DE4 Integra – Turbocharged 1.5L L4 – 2023-2025 Acura DE4 Integra Elite A-Spec Turbocharged 1.5L L4 – 2023-2025 Honda 11th Gen Accord – Turbocharged 1.5L L4 – 2023-2025 Honda 11th Gen Accord – Electric/Gas 2L L4 – 2022-2024 Honda FE1/FL1 Civic EX Turbocharged 1.5L L4 – 2022-2023 Honda FE1/FL1 Civic EX-L Turbocharged 1.5L L4 – 2022-2025 Honda FE1/FL1 Civic Si Turbocharged 1.5L L4 – 2022-2024 Honda FE1/FL