Koyorad 03-09 Toyota 4Runner/Lexus GX470 4.7l Aluminum Radiator - Off-Road Use Only - VH011703N

Koyorad 03-09 Toyota 4Runner/Lexus GX470 4.7l Aluminum Radiator - Off-Road Use Only - VH011703N aftermarket automotive part

This all-aluminum performance radiator is designed for 4th Generation 2003-2009 Toyota 4Runner and 2003-2009 Lexus GX470 vehicles with the 4.7L V8 (AT). It uses Koyorad N-FLO triple pass technology with strategically placed internal partitions to promote complete core coverage and improved efficiency compared to an OEM-style single pass configuration.

SKU: koyVH011703N. Built for serious off-road use, the internal automatic transmission cooler is intentionally omitted to support external transmission cooler setups and to eliminate the risk of coolant and transmission fluid breech that can lead to catastrophic engine and drivetrain damage.

Key Benefits

• All-aluminum, 36mm high-density HyperCore supports heat capacity and endurance under load.
• N-FLO triple pass design improves coolant routing versus OEM-style single pass radiators.
• Strategic internal partitions promote complete core coverage for improved cooling efficiency.
• Slim core profile is over 33% thicker than stock without extra volume.
• No internal AT cooler eliminates risk of coolant and transmission fluid breech.
• TIG welded and furnace brazed construction supports durability in off-road environments.
• Triple pressure tested in Koyorad’s private ISO 9001 certified factory.

Notes

• Off-Road Use Only, will require external transmission cooler (not included)
• Use Koyorad SK-C13 or equivalent deep plunger style radiator cap, not compatible with OEM cap

Advanced engineering, precise TIG welds, and controlled furnace brazing are paired with triple pressure testing to support consistent quality. With the internal AT cooler removed, this radiator is suited to builds that prioritize serviceable external transmission cooling and reduced cross-contamination risk in demanding conditions.