Koyo is Japan's largest aftermarket radiator manufacturer. The Koyo radiator is produced from aircraft quality aluminum and Heli-arc welded. Heli-arc soldering is the highest quality standard for enforcement along aluminum connections. - Fully polished to a mirror finish. 30% more cooling than standard radiators. Perfect for Turbocharged, Supercharged & Nitrous Oxide equipped engines - Custom built OEM fit. All radiator cores and tanks are specifically designed and built for each application. No universal fit parts are used. This ensures proper fit, just like your original equipment! Made from aircraft quality aluminum and Heli-arc welded, cores are NOCOLOK-brazed.