With Summer just around the corner, now’s the perfect time to make sure your FL5 or DE5 is ready for the heat. Koyorad proudly presents the first high-performance radiator designed specifically for both platforms. Featuring Koyorad’s high density hyper core that’s over 50% thicker than stock, this all-aluminum upgrade improves cooling and endurance—perfect for spirited driving or track days.

Koyorad engineered this radiator as a direct OEM replacement, with full compatibility for factory fans, switches, A/C condenser, and hoses—making it an easy install. Backed by expert craftsmanship and triple-tested for quality, it’s built to perform and last.

Whether you’re daily driving or chasing lap times, this is a cooling upgrade your FL5 or DE5 deserves.

More Ways to Improve Cooling

Acuity Super Cooler Reverse Flow Silicone Radiator Hoses

These hoses reverse the water flow through the radiator, which helps dissipate heat more effectively than the OEM radiator hoses. Developed as part of a project to help HRC (Honda Racing Corporation) cool their race cars more efficiently.

PRL Motorsports Baffled Coolant Expansion Tank

PRL’s aluminum expansion tank replaces the weak stock plastic one, holds more than twice the coolant, and handles higher heat and pressure for better cooling and reliability.

Radium Engineering Coolant Tank

Because of continuous heat cycling, plastic coolant tanks have a reputation of failing overtime. This replaces the factory plastic tank, increasing longevity.

Origin Fabrication Coolant Expansion Tank

Replaces the unreliable factory plastic unit. This is the best representation of an OEM+ part we could think of.

Available in Raw Aluminum and Anodized Black.

APR Performance Carbon Fiber Cooling Plate Kit

Designed to channel the flow of air directly to the radiator, improving the efficiency of the radiator while adding a race inspired look to your engine bay.