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DO88 WC-410

do88 BMW G-Series B58/Toyota GR Supra MK5 (A90) Auxiliary Radiator

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UGC WC-410
$490.95 - $490.95
$490.95
$490.95 - $490.95
$490.95
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CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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Upgrade the performance of your B58 Gen 2 engine with the do88 Performance Auxiliary radiators!

The B58 Engine Cooling System
The B58 engine features a cooling system with three frontal radiators, one large central radiator and two smaller auxiliary radiators located in front of each wheel. Tuned engines produce significantly more heat, making it challenging to maintain optimal engine temperatures during intense street, track, or drag strip driving. The OE auxiliary radiators have slim cores and plastic tanks, which are not ideal for tuned cars. Upgrading these auxiliary radiators is will help to ensure proper engine temperature.

Our Solution
Fortunately, the design space available for the auxiliary radiators allows for both increased frontal surface area and core thickness on both sides of the car. The OE radiator is identical for both sides, and our do88 Performance Radiators are designed to be drop-in replacements for both left and right sides. We offer them as a pair because upgrading just one radiator isn't as effective as upgrading both simultaneously. Our Performance Auxiliary Radiators provide enhanced cooling capacity to prevent heat soaking. Key features include:

  • Larger core volume than the original equipment (OE).
  • Dual-row core with a thickness of 40mm.
  • Full aluminum construction, complete with durable TIG-welded end tanks.
  • Increased fluid capacity for optimal heat dissipation.

Installation
The installation is simple, as our radiators come with CNC-machined mounting brackets and OE-style “Quick Connect” inlet/outlet connections. The OE rock guard can be easily attached to our radiators for protection against small rocks and road debris.

Installation instructions (PDF)

Fitment notes

  • Only suitable for cars with a remote radiator (17118672237) on the right side from factory. This is included in the M Technology Package with option code: 33T

This part also goes by the following cross reference.

Cross Reference Part Number: 17118672237, 16400-WAA04

Fits These Vehicles 5 applications
Toyota
Make Model Engine Years
Toyota GR Supra MK5 (A90) B58 2020–present
BMW
Make Model Engine Years
BMW 2' M240i M240iX (G42) B58 2022–present
BMW 3' M340i M340iX (G20 G21) B58 2018–present
BMW 4' M440i M440iX (G22 G23 G26) B58 2021–present
BMW Z4 M40i (G29) B58 2017–present

Fitment data last updated: 2026-10-21

Fits 5 vehicle applications Check vehicle fitment before ordering View fitment

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