Koyorad A2781 Radiator
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Koyorad

Koyorad A2781 Radiator

Brand Koyorad A2781
Core Height 15.75
Core Material Aluminum
Core Row Quantity 1
Core Thickness 1.0625
Core Width 28.875
Inlet Diameter 1.5
Internal Transmission Oil Cooler Yes
Outlet Diameter 1.5
Tank Material Plastic
Title Koyorad a2781 radiator
Transmission Oil Cooler Diameter 1.125
Transmission Oil Cooler Included Yes
Fits Lexus · 2 vehicles

OE equivalent replacement. Built to match the original radiator’s function for a straightforward swap.

Aluminum core. Helps promote efficient heat transfer with a lightweight design.

Transmission oil cooler included. Adds integrated cooling support in one radiator assembly.

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Koyorad A2781 Radiator for Lexus GS430

The Koyorad A2781 radiator is an OE-equivalent replacement built for 2006-2007 Lexus GS430 applications. It combines an aluminum core with plastic tanks and includes an internal transmission oil cooler for direct-fit cooling system service.

Key Features

  • Fits 2006-2007 Lexus GS430, N/A
  • Aluminum core with plastic tank construction
  • Single-row core design
  • Core dimensions: 15.75 in. height, 28.875 in. width, 1.0625 in. thickness
  • 1.5 in. inlet and 1.5 in. outlet diameters
  • Internal transmission oil cooler included
  • Transmission oil cooler diameter: 1.125 in.

Detailed Description

Koyorad A2781 is a radiator replacement engineered for the 2006-2007 Lexus GS430, with dimensions and cooling features that align with OE-style service needs. The aluminum core supports efficient heat transfer, while the plastic tanks match common factory-style radiator construction. This radiator also includes an internal transmission oil cooler, making it a practical choice for vehicles that route transmission fluid through the radiator assembly. If you are searching for a Lexus GS430 radiator replacement or a Koyorad A2781 radiator for 2006-2007 Lexus GS430 fitment, this part is built around those exact applications.

What It Helps Address

  • Coolant leaks from a damaged or aging radiator
  • Overheating caused by restricted or inefficient heat exchange
  • Transmission fluid cooling concerns tied to a failed internal cooler
  • Cracked plastic tanks or worn radiator seams
  • Reduced cooling performance in a high-mileage Lexus GS430

Installation Notes and Tips

Verify inlet and outlet sizing, core dimensions, and transmission cooler connections before installation. Flush the cooling system, inspect hoses and clamps, and confirm the radiator mounts securely in the factory location. For best results, replace worn coolant and check for debris or contamination in the cooling circuit during service.

Quality Assurance

Koyorad states that its radiators are built as OE-equivalent replacements using technical manufacturing experience focused on getting the job done correctly the first time. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Related reading

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2007LexusGS4304.3LV8N/A—
2006LexusGS4304.3LV8N/A—