Maximum Cooling.
No Compromise
The PHR XTM Aluminum Race Radiator is the most extreme cooling solution we offer for the MKIV Toyota Supra. With an enormous 62mm-thick core — the largest we’ve ever built — it delivers unmatched engine cooling for the most demanding street, strip, and race applications. The integrated internal transmission cooler is 100% larger than OEM, providing superior transmission cooling for high-horsepower automatics, eliminating the need for an external cooler. When only the absolute best will do, the XTM is the radiator of choice.
🔥 New for the XTM: Internal Transmission Cooler
We’ve taken the performance even further with an integrated internal transmission cooler — 100% larger than the OEM unit, and even larger than the cooler in our standard Race Radiator.
This delivers outstanding transmission cooling, eliminating the need for an external trans cooler in most builds. Perfect for built A340E, TH400, or Powerglide automatics, and street/strip setups running serious power.
Key Features & Technical Specifications
Design Features
Core Thickness: 2.5" (62mm) thick, high-efficiency aluminum core
Improved Cooling Capacity: Significantly increases coolant volume and surface area over OEM, reducing coolant temps under high load or race conditions
Pressure Rating: Includes a 1.1 Bar (16 psi) radiator cap
Cap Location: Positioned at the highest point for easy bleeding and coolant fill
Construction
Material: Precision TIG-welded all-aluminum construction
End Tanks: Fully-welded, high-strength aluminum end tanks (not crimped like factory)
Direct Fit Installation
OEM Fitment: Drop-in fit for 1993–1998 Toyota Supra (MKIV / A80)
No Cutting or Modifications: Utilizes factory mounting points and accepts OEM fan shroud and radiator hoses (when using OEM configuration)
Transmission Compatibility
- Standard Model: Designed for manual transmission vehicles, or vehicles utilizing standalone transmission coolers, this version eliminates the internal cooler as not transmission cooling is needed.
- Optional Internal Transmission Cooler: The PHR internal transmission cooler, now available for automatic transmission cars, boasts a MASSIVE increase in transmission cooling capability with over 100% larger internal volume and surface area. This increases flow through the cooler and a huge increase in cooling capacity.
Fan Compatibility
Fully compatible with both OEM fans and aftermarket fan shroud/fan kits
Can be paired with PHR’s brushless fan kits or electric fan upgrades.
Click here to see PHR Electric Fan Kits.
Connection Options
- OEM Hose Style: Uses standard rubber hoses for plug-and-play installation
- -20AN Fittings: Optional upgrade (+$100) for racers using AN-style coolant lines for maximum flow and reliability under high pressure
Finish Options
Available with various powder coating options as well as polishing service.
- Gloss Black
- Matte Black
- Wrinkle Black
- Polished
Transmission Compatibility
No compromise
Options for either Manual Transmission or Automatic Transmissions.
- Internal Transmission Cooler: The PHR internal transmission cooler, now available for automatic transmission cars, boasts a MASSIVE increase in transmission cooling capability with over 100% larger internal volume and surface area over OEM. This increases flow through the cooler and a huge increase in cooling capacity.
We also have an option to convert the connection fittings to -6AN instead of the standard metric or barb fittings included. Just add our stainless adapter fittings to your order when adding to cart. - Standard Model: Designed for manual transmission vehicles, or vehicles utilizing standalone transmission coolers, this version eliminates the internal cooler as not transmission cooling is needed.
A comparable difference
We've got two big upgrades
Compared to our own PHR Aluminum Race Radiator (50mm thick), the XTM core measures in at a massive 62mm thick. For perspective:
- OEM Non-Turbo: 17mm
- OEM Turbo: 41mm
- PHR Race: 50mm
- PHR XTM: 62mm
This isn’t just bigger — it’s engineered for the most brutal drag racing, road racing, or street performance applications, where heat is the enemy and cooling is critical.
For a little more budget oriented build but still a huge upgrade, the PHR Race may be the radiator of choice.
Specifications
| Vehicle Fitment | |
|---|---|
| Make | Toyota |
| Model | Supra |
| Chassis Code | A80 |
| Generation | MKIV (Mark 4) |
| Trim | Turbo, Naturally Aspirated (NA) |
| Product Specs | |
|---|---|
| Material | Aluminum |
| Variants | |
|---|---|
| Finish | Raw or Gloss black powder coat or Matte black powder coat or Wrinkle black powder coat or Polished |
| Radiator inlet/outlet | OEM hose inlet and outlet or -20AN inlet and outlet |
| Transmission Cooler | No Transmission Cooler or Internal Transmission Cooler |
