Rywire Radiator

Rywire Radiators: Purpose-Built Cooling for Serious Honda Builds

When Honda and Acura enthusiasts push their B-series or K-series builds to the limit, cooling becomes as critical as the engine itself. Rywire has carved out a respected niche in the Honda tuner community not just for their wiring expertise, but for a line of radiators engineered with the same attention to detail and clean-build philosophy that defines everything they make. These aren't off-the-shelf cooling solutions — they are custom-designed radiators built specifically for the radiator tuck aesthetic and high-performance functionality.

Manufactured in Partnership with CSF

Rywire manufactures brand-new custom radiators built for performance and the radiator tuck style. Critically, the Rywire custom tuck radiator is made by CSF Radiator — one of the most respected names in performance heat exchangers — bringing proven manufacturing quality to Rywire's clean-build design vision. This collaboration means builders get the best of both worlds: Rywire's Honda-tuning expertise paired with CSF's high-grade core technology.

The Custom Tuck Radiator

The flagship Rywire Custom Tucked Radiator is designed with genuine versatility. It can work with any car and engine , making it a popular choice for engine-swapped chassis that need a clean, low-profile cooling solution. The small radiator measures 24 inches wide by 9 inches tall at 3.5 inches thick, while the large option measures 24 inches wide by 13¼ inches tall at 3.5 inches thick — giving builders two size options to suit different bay configurations.

What sets these radiators apart from conventional replacements is the mounting hardware flexibility. Optional -16 AN bungs or hose end fittings are included, along with mounting tabs that can easily be adapted to virtually any vehicle application, with two mounting locations to choose from — and tabs that can even be flipped for additional fitment options. The drain tab is positioned on either the top or bottom of the side tank, making this a truly flippable design — and the top drain can even be used as a custom filler location.

The Ultimate Drag Race Radiator

For builders chasing maximum performance on the strip, Rywire also offers the Ultimate Drag Race Radiator. Made in partnership with CSF, this universal unit features a 3.5-inch 2-row core with B-tube technology — claimed to be the world's largest 2-row core — with threaded bungs accepting 1.25-inch and -16 inlet/outlet connections. This makes it equally at home in purpose-built race cars as in heavily modified street builds.

Perfect for Honda/Acura Platform Builds

With fan shrouds, optional AN fittings, and custom brackets, Rywire radiators are a natural fit for Honda/Acura, B-series, and K-series builds. The dual-core, dual-pass internal design promotes efficient coolant flow — critical when high-compression or turbocharged engines generate serious heat. Whether you're building a tucked show car or a competitive drag machine, Rywire's radiator lineup delivers the form and function that Honda builders demand.

Explore the full Rywire brand catalog or browse all performance radiators to find the right cooling solution for your build.