This Mishimoto Ultimate Bundle includes upgraded cooling components to replace items we've found to be the most failure-prone. For the 2013-2021 BRZ, FR-S, and GT86, we've bundled together our aluminum radiator, silicone radiator hose kit, racing thermostat, fan shroud, aluminum coolant overflow tank, and thermostatic oil cooler kit. As the stand-out component, our aluminum radiator features durable TIG-welded end tanks and a large 1.37in-thick two-row core with strategically designed fins to provide optimal cooling efficiency. To supplement our robust radiator, we've included our incredibly durable silicone radiator hose kit. Mishimoto silicone hoses are constructed from high-grade 4-ply silicone with heat-resistant embedded fibers for superior heat and pressure tolerance. Our Ultimate Bundle also includes the Mishimoto FA20 Racing Thermostat. The Mishimoto thermostat has a lower activation temperature than the factory thermostat, allowing coolant to flow through the engine earlier, reducing the risk of overheating in hot environments. Also handling coolant temperature regulation is our Performance Aluminum Fan Shroud kit. This fan shroud features OEM-style plugs and two high-flow 12-in fans, providing optimal airflow during idle conditions. The Mishimoto Aluminum Overflow Tank features professional TIG-welded construction and improved durability during repeated temperature transitions. Oil temperature regulation is vital to extending the life of your flat-four. Therefore, we've included our direct-fit thermostatic oil cooler kit, which features a large 19-row oil cooler to ensure proper fluid temperatures in any driving condition. Time to re-habilitate the cooling system of your FA20 with the Mishimoto Ultimate Bundle. As with all our products, this bundle includes the signature Mishimoto Lifetime Warranty.