CSF Honda Civic Si (FE1) 2022+ High-Performance Radiator

The Civic Si has been the darling of the compact tuner market since the 1980s, and the formula of a lightweight chassis paired with a high-revving, powerful engine has influenced countless tuner cars over the decades. While the latest FE1 Civic Si isn't quite as small or light as the older models, it's still a genuine blast to drive, and out of the box, both the Civic Si and its Acura sister car, the DE4 Integra, are already very capable, powered by Honda's 1.5L Turbo making 200hp. But hard track driving can quickly tax the limits of the factory equipment, especially on modified and tuned examples generating considerably more heat.

CSF has a long and successful track record with Honda cooling systems, including manufacturing factory radiators for Honda Performance Development, and used the information and experience from building their FK8 Civic Type R TCR race radiator to design this High-Performance version for the everyday enthusiast. Just like that racing unit, this radiator features CSF's latest 5mm fin cooling technology, with smaller fins significantly increasing heat exchange surface area for improved cooling efficiency, a design that increases heat transfer area by 20-25% over larger fin designs. A 33% larger, 2-row, 42mm aluminium core increases fluid capacity and the core's ability to dissipate heat, and CSF's exclusive B-Tube technology adds a further approximately 15% heat transfer improvement over regular oval welded tubes. Turbo cars run hot, and the L15CA is no exception, so keeping temperatures in check genuinely improves the longevity of the motor and its components. 100% all-aluminium, TIG-welded construction increases overall strength considerably over the factory design.

Works with: Factory mounting location. True drop-in fit.

Why Choose This Radiator

• Built on genuine race radiator experience developed for Honda's own factory racing program
• 33% larger 2-row, 42mm core than the OEM's single-row design
• Latest 5mm fin technology, increasing heat transfer area by 20-25% over larger fin designs
• CSF's exclusive B-Tube technology, approximately 15% more heat transfer than regular tubes
• 100% all-aluminium, TIG-welded construction for genuine long-term durability
• A worthwhile upgrade for spirited driving, hard track use, or tuned builds

Compatibility

• Honda Civic Si (FE1, 2022+, 11th Gen, 1.5L Turbo L15CA)
• Acura Integra (DE4, 2023+, Base/A-Spec)