New Release: Koyo Racing Radiators for the 97-05 Toyota Aristo / Lexus GS300

If you know, you know: the second-gen GS300 and its JDM twin, the Aristo, are some of the best platforms Toyota ever built. The 2JZ under the hood will outlive all of us. The radiator in front of it? Not so much.

Every JZS160 and JZS161 on the road is now running on a cooling system that's pushing two to three decades old. Factory radiators use crimped plastic end tanks, and age plus heat cycles turn them brittle. It's not a question of if the stock unit lets go — it's when. And if you're making boost on a 2JZ-GTE Aristo V300 or a turbo GS300 build, the factory core didn't have the headroom to begin with.

Why Koyo

Koyo (Koyorad) has been building radiators for professional motorsport and OEMs for decades — it's the name serious builders reach for when cooling actually matters. The Hyper-V series unit we're stocking (part number HH010647) is a full aluminum radiator with a high-density 36mm core that delivers a serious step up in heat rejection over the aging factory piece.

• All-aluminum construction — no plastic end tanks to crack
• High-density Hyper-V racing core for maximum cooling capacity
• Direct OEM-style bolt-in fitment for the JZS160 / JZS161 chassis
• Perfect for 2JZ-GE daily drivers, VIP builds, and boosted 2JZ-GTE setups
• $796.00 — genuine Koyo, sold and supported by PMD

Who This Is For

The VIP crowd daily-driving a GS on air. The Aristo owner chasing single-turbo numbers. The GS300 track rat who's tired of watching the temp gauge creep. Whether your build is about stance or speed, cooling is the foundation — and this is the piece we trust enough to put our name behind. Buy Once, Cry Once.

Not sure about fitment with your fans, shroud, or swap? Call or text us at 904-755-8360 (M-F 9am-5pm EST) and we'll confirm your setup before you order. For the full breakdown of specs and FAQs, check out our Koyo GS300 / Aristo radiator guide.