Best Radiators and Cooling Upgrades for the GR Supra MK5: 5 Top Picks Compared
For a 2020–2026 GR Supra 3.0, the best radiator and cooling upgrades in our catalog are the CSF high-performance auxiliary radiator ($349) as the first step, the Mishimoto performance auxiliary radiators ($524.95) as the matched alternative, the Mishimoto performance aluminum radiator ($759.95) and the CSF all-aluminum radiator ($789) as the two main-core choices, and the Mishimoto radiator kit ($1,303.95) when you want the system done in one purchase. Every pick below was verified live in our catalog today. Note the split that matters on this car: the main radiator and the auxiliary radiators do different jobs, and the listings below keep them separate.
Main Core vs. Auxiliary — the Supra's Two Cooling Jobs
The GR Supra's cooling system is not one radiator but a main core plus auxiliary radiators supporting the charge-air and ancillary circuits. That is why this guide is organized the way owners actually buy these parts: auxiliary capacity first for cars that heat-soak their charge cooling on track, then the main core for cars whose coolant temperatures are the problem. If your symptom is the disappearing-coolant one, read our Supra water pump guide first — no radiator fixes a leaking pump.
1. CSF High-Performance Auxiliary Radiator — $349.00
CSF High-Performance Auxiliary Radiator Toyota GR Supra 2020+ — $349.00. The entry point and the usual first purchase: a high-performance auxiliary radiator listed for the 2020 and newer GR Supra at $349. Auxiliary capacity is where tuned and tracked Supras feel heat first, so this is the highest-value dollar in the guide.
2. Mishimoto Performance Auxiliary Radiators — $524.95
Mishimoto [20-26 Supra] Performance Auxiliary Radiators - 3.0L — $524.95. Mishimoto's auxiliary set, listed for the 2020–2026 Supra 3.0 at $524.95. Choose between this and the CSF above on the rest of your build plan — owners building an all-one-brand engine bay tend to pair these with the Mishimoto main core below.
3. Mishimoto Performance Aluminum Radiator — $759.95
Mishimoto [20-26 Supra] Performance Aluminum Radiator - 3.0L — $759.95. The main-core Mishimoto option at $759.95, listed for the 2020–2026 3.0L car. This is the purchase for coolant temperatures that climb in traffic and on track alike, rather than charge-cooling heat soak alone.
4. CSF All-Aluminum Radiator — $789.00
CSF 2020+ Toyota A90/A91 GR Supra All-Aluminum Radiator — $789.00. CSF's main-core answer at $789, listed for the 2020 and newer A90/A91 GR Supra (the listing also covers the BMW Z4 and G2X cars that share the platform). Within $30 of the Mishimoto, this is a brand-and-build choice rather than a price one.
5. Mishimoto Performance Aluminum Radiator Kit — $1,303.95
Mishimoto [20-26 Supra] Performance Aluminum Radiator Kit - 3.0L — $1,303.95. The one-box route: Mishimoto's radiator kit at $1,303.95 for owners who would rather buy the system once than piece it together across two orders. It is the most expensive pick here because it is the most complete one.
Finish the Supra Build
Cooling pairs with the charge-side parts in our Supra charge pipe and cooling guide and the full picture in our GR Supra modification guide. For the JDMuscle-brand piece of a Supra build, the JDMuscle [20+ Supra] V1 Carbon Fiber Duck Bill — from $339.00 remains the catalog's own aero starting point.