CSF 2023+ Honda Civic FL5 Type R / 2024+ Acura Integra DE5 Type S All-Aluminum Radiator (7221)
Backed by decades of success in Honda cooling systems, CSF brings its race-winning expertise to the streets with the High-Performance Radiator for the FL5 Civic Type R. With a proven history that includes producing factory radiators for Honda Performance Development (HPD) and supplying the FK8 Civic Type R TCR race program, CSF has once again raised the bar in cooling innovation. This high-performance radiator is derived directly from CSF’s HPD Race Radiator, now engineered for enthusiasts seeking track-level performance in a street-ready package. Featuring CSF’s cutting-edge 5mm fin cooling technology, it increases heat transfer efficiency by 20–25% compared to traditional larger fin designs—delivering superior cooling capacity under extreme conditions. Perfect for spirited driving, track use, or daily reliability, the CSF High-Performance Radiator ensures your FL5 runs cooler, performs stronger, and stays reliable.
CSF vs OEM: The original OE radiator from Honda is a plastic tank with a single row aluminum core design. While this is generally accepted as good quality and durable, it is not the best option for high horsepower builds and hard driving. Turbo cars get hot, and the K20C1 is no exception. Anything you can do to help keep temperatures in check will improve longevity of your motor and components.
Just like the HPD Race Radiator, the CSF FL5 Civic Type R / DE5 Integra Type S Radiator features the latest 5mm fin technology. The smaller fins significantly increase the heat exchange surface area improving overall cooling efficiency. A larger 2-Row 42mm aluminum core increases the fluid capacity of the radiator, and improves the cores ability to dissipate heat. CSF’s Exclusive B-Tube Technology increases the heat transfer by approximately 15% over regular oval welded tubes. In addition, the super-efficient multi-louvered fins maximize airflow through the core for the best possible performance. Overall, testing has revealed that the CSF radiator decreases engine coolant temperatures by 6-8% compared to the factory radiator.
Testing CSF vs OEM: Testing was performed on a FL5 Civic Type R tuned to 294 whp and equipped with an upgraded/larger Front Mount Intercooler. The larger front mount intercooler has been shown to raise engine coolant temperatures by ~7%. This is due to the airflow restriction over the radiator. Test results show a decrease of of 8°C engine coolant temperature with the CSF Radiator vs OEM. As you can see, a radiator upgrade will be very important to anyone running a larger intercooler. The upgraded radiator will also be beneficial to anyone tracking their car.
Application
- Honda Civic FL5 Type R (2023, 2024, 2025)
- Acura Integra (2024, 2025)
Features
- True Plug-and-Play “Drop-in Fit” Installation Requires Absolutely No Modifications
- 2-Row, 42mm Ultra-High-Performance Core
- CNC Machined Mounting Brackets and OEM Style Inlet/Outlet
- 100% All Aluminum TIG-Welded Construction
- New 5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact
- Improved overall cooling efficiency
- Increases the heat transfer by approximately 15% over regular oval welded tubes
- Multi-louvered fins maximize airflow through the core
To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.
Depending on the package, we ship using different carriers according to the item's location, content, and size.
Freight truck & international items, will require up to 7 business days to ship due to size and logistics.
All orders made after 3:00pm ET will be processed the next business day.
Unless otherwise noted as "In Stock" with qty amount. Pre-Orders, Special orders, & Made to order items have an estimate of 5+ weeks for USA made parts and 10+ weeks for JDM/ Overseas parts. Please check with us for exact ETA as it will vary by brand and item.
Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $200.
All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.
Processing and logistics on in stock international orders will take up to 7 business days to process & ship as sometimes we only have 1 international pickup a week.
In stock, non pre-orders or special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Pre-Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).
Any non credit card processed order will have a 6% cancelation fee to cover the loan processing or 3rd party merchant fee. No fee will be incurred if used as store credit.
For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.
WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.
CSF 2023+ Honda Civic FL5 Type R / 2024+ Acura Integra DE5 Type S All-Aluminum Radiator (7221)
