Crossflow Radiator w/ 31mm Core

The Supermiata Crossflow Radiator is engineered to provide superior cooling performance for 1990-2005 Mazda MX5 Miata models, including both NA and NB generations. This radiator utilizes a crossflow design, where coolant travels side-to-side, allowing for extended heat shedding compared to traditional downflow radiators. Its lightweight aluminum construction features a 31mm core with a "B tube" design, which incorporates a divider within each tube to increase surface area and equalize internal pressures, optimizing heat transfer. The core boasts a high fin density of 19.5 FPI and a compact 6.5mm fin height, balancing cooling efficiency with minimal size and weight (7.8 lbs). It comes equipped with dual 10x1.25 drain plugs for easy maintenance and a high-pressure 1.4 bar (20psi) radiator cap, raising the system's boiling point. For NA models, it requires the use of OEM radiator side mounts. NB models offer a plug-and-play fitment without the need for adapter brackets common with other crossflow radiators. It's important to note that if your vehicle does not have a coolant reroute, a different upper radiator hose will be necessary; information is available via a provided link. A specific note for the 04-05 Mazdaspeed models indicates that DIY modification is required to clear the OEM intake tubing and to change to 2-piece OEM radiator fans. The manufacturer emphasizes the use of stock primary fans and shroud for optimal cooling at speed, advising against aftermarket shrouds which can impede airflow above 20mph. This radiator is backed by a 5-year warranty, the longest in the industry, and has a proven track record with numerous race wins, lap records, and championships in Miata competition. Replacement sacrificial anodes are also available.