According to the Absolute Radiator literature, the Koyo High Performance Radiator is:

• Handles high revving, high performance motors
• Provides 20% to 30% more cooling than standard radiators
• Perfect for Turbo Charged, Super Charged & Nitros Oxide equipped engines
• Made from aircraft quality aluminum and Heli-arc welded, cores are NOCOLOK-brazed (no epoxy)
• All radiators are fully polished to a mirror finish
• Koyo is on the cutting edge of technology and design with Japan's largest automobile manufacture

And they add:

".....KoyoŽ brand Japanese-Spec racing radiators previously unavailable in this country. These radiators are intended for makes and models primarily used for autocrossing and drifting."
Ha! LOL.

Noteworthy:

• Part #R-0171-Koyo High Performance Aluminum Radiator
• Mounting: OEM fit for JZA70, 2.5 Twin Turbo 1JZ-GTE
• Core: Two [2] core, 50mm
• On 7M-GTE: Need to fab a bracket to mount aux OEM efan lower flange
• On 7M-GTE: Need to fab retaining tabs for lower shroud
• On 7M-GTE: The fit is otherwise perfect, & the polished finish/workmanship is worth the trouble